alloc/test: Add test for interleaved TBF chains

MS iniated TCP connections generally result in a sequence
of short time UL and longer lasting DL TBFs, being interleaved
between several MS. This scenario is not covered by the existing
tests.

This commit adds a test, that allocates as man as possible TBFs
several times with different test modes without clearing the BTS (and
thus the TBF list) in between. The number of allocated DL TBFs in
each round is expected to be constant.

Sponsored-by: On-Waves ehf
diff --git a/tests/alloc/AllocTest.err b/tests/alloc/AllocTest.err
index 33925dc..c3852fe 100644
--- a/tests/alloc/AllocTest.err
+++ b/tests/alloc/AllocTest.err
@@ -51,3 +51,412 @@
 No TFI available.
 No TFI available.
 - Failed to allocate a TFI
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+- Failed to find a usable TRX (TFI exhausted)
+  Allocated 160 TBFs (previously -1)
+- Failed to allocate a TS, no TFI or USF available
+  Allocated 35 TBFs (previously 160)
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+- Failed to find a usable TRX (TFI exhausted)
+  Allocated 160 TBFs (previously 160)
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+- Failed to find a usable TRX (TFI exhausted)
+  Allocated 160 TBFs (previously 160)
+No TFI available.
+No TFI available.
+- Failed to allocate a TFI
+  Allocated 32 TBFs (previously -1)
+No USF available
+  Allocated 24 TBFs (previously 32)
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+- Failed to allocate a TFI
+  Allocated 32 TBFs (previously 32)
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+No TFI available.
+- Failed to allocate a TFI
+  Allocated 32 TBFs (previously 32)