TC_sabm_retransmit BTS_Tests_LAPDm

Failing for the past 2 builds since #2720

Took 12 sec (from Titan)

Stack Trace

Timeout waiting for L1CTL_RESET_CONF
      BTS_Tests_LAPDm.ttcn:1349 BTS_Tests_LAPDm control part
      BTS_Tests_LAPDm.ttcn:229 TC_sabm_retransmit testcase