TC_sabm_contention BTS_Tests_LAPDm

Regression

Failing for the past 1 build since #2738

Took 39 sec (from Titan)

Stack Trace

FBSB Failed with non-zero return code 255
      BTS_Tests_LAPDm.ttcn:1466 BTS_Tests_LAPDm control part
      BTS_Tests_LAPDm.ttcn:195 TC_sabm_contention testcase