TC_t200_n200 BTS_Tests_LAPDm

Failing for the past 28 builds since #2697

Took 15 sec (from Titan)

Stack Trace

"BTS_Tests.ttcn:693 : Unexpected RSL message received"
      BTS_Tests_LAPDm.ttcn:1351 BTS_Tests_LAPDm control part
      BTS_Tests_LAPDm.ttcn:1171 TC_t200_n200 testcase