TC_data_rtp_tchh48 BTS_Tests

Failing for the past 50 builds since #3146

Took 5.3 sec (from Titan)

Stack Trace

Timeout waiting for matching Downlink data frame
      BTS_Tests.ttcn:9597 BTS_Tests control part
      BTS_Tests.ttcn:8880 TC_data_rtp_tchh48 testcase