TC_pcu_socket_reconnect BTS_Tests

Regression

Failing for the past 1 build since #2678

Took 3.1 sec (from Titan)

Stack Trace

Error connecting to PCU socket "/data/unix/pcu_sock": "Connect was unsuccessful"
      BTS_Tests.ttcn:9529 BTS_Tests control part
      BTS_Tests.ttcn:6377 TC_pcu_socket_reconnect testcase