BTS_Tests: add new test case TC_ho_physical_info

The test case scenario can be summarized as follows:

1. Activate a logical channel for async handover.
1.a. Tune the MS side to that channel.
1.b. Make sure that no Downlink DCCH is received.
2. Send a handover Access Burst to the BTS.
2.a. Expect RR Physical Information to be received Ny1 times.
2.b. Expect no other data to be received on Downlink DCCH.

Currently the new test case fails for several reasons:

* osmo-bts-trx starts transmitting on DCCH before the handover
  Access Burst is received, this is wong;
* trxcon immediately starts sending dummy frames on Uplink
  DCCH, causing osmo-bts to stop sendig RR Physical Info.

Change-Id: I9469027ce88fb2750f1eceef2d8a56d4b8ee4d03
Related: SYS#5838
diff --git a/bts/expected-results.xml b/bts/expected-results.xml
index 2dffe06..e3804a4 100644
--- a/bts/expected-results.xml
+++ b/bts/expected-results.xml
@@ -16,6 +16,12 @@
   <testcase classname='BTS_Tests' name='TC_rach_count' time='MASKED'/>
   <testcase classname='BTS_Tests' name='TC_rach_max_ta' time='MASKED'/>
   <testcase classname='BTS_Tests' name='TC_ho_rach' time='MASKED'/>
+  <testcase classname='BTS_Tests' name='TC_ho_physical_info' time='MASKED'>
+    <failure type='fail-verdict'>"BTS_Tests.ttcn:MASKED : Rx unexpected Downlink DCCH (before handover RACH): MASKED"
+      BTS_Tests.ttcn:MASKED BTS_Tests control part
+      BTS_Tests.ttcn:MASKED TC_ho_physical_info testcase
+    </failure>
+  </testcase>
   <testcase classname='BTS_Tests' name='TC_rach_load_idle_thresh0' time='MASKED'/>
   <testcase classname='BTS_Tests' name='TC_rach_load_idle_below_thresh' time='MASKED'/>
   <testcase classname='BTS_Tests' name='TC_rach_load_count' time='MASKED'/>