TC_rsl_modify_encr BTS_Tests:hopping

Failing for the past 4 builds since #20

Took 7.5 sec (from Titan)

Stack Trace

"BTS_Tests.ttcn:7644 : Timeout waiting for UNIT_DATA_IND"
      BTS_Tests.ttcn:9447 BTS_Tests control part
      BTS_Tests.ttcn:7779 TC_rsl_modify_encr testcase