add msc_vlr_test_call to reproduce a sanitizer error

On MT call, there is a bug in CC conn use which leads to an early free and
use-after-free.

Add msc_vlr_test_call to show both MO and MT call legs separately and reproduce
the failure. It is visible in a sanitizer build (on debian 9).

A subsequent patch will fix the bug: If0659a878deb383ed0300217e2c41c8c79b2b6a5

Related: OS#2672
Change-Id: I6c3ca0c660388b1e2c82df17ec540c846201b0c7
diff --git a/tests/testsuite.at b/tests/testsuite.at
index f0147e7..5307899 100644
--- a/tests/testsuite.at
+++ b/tests/testsuite.at
@@ -79,6 +79,13 @@
 AT_CHECK([$abs_top_builddir/tests/msc_vlr/msc_vlr_test_reject_concurrency], [], [expout], [experr])
 AT_CLEANUP
 
+AT_SETUP([msc_vlr_test_call])
+AT_KEYWORDS([msc_vlr_test_call])
+cat $abs_srcdir/msc_vlr/msc_vlr_test_call.ok > expout
+cat $abs_srcdir/msc_vlr/msc_vlr_test_call.err > experr
+AT_CHECK([$abs_top_builddir/tests/msc_vlr/msc_vlr_test_call], [], [expout], [experr])
+AT_CLEANUP
+
 AT_SETUP([msc_vlr_test_rest])
 AT_KEYWORDS([msc_vlr_test_rest])
 cat $abs_srcdir/msc_vlr/msc_vlr_test_rest.ok > expout