TC_beat_timeout STP_Tests_IPA

Regression

Failing for the past 1 build since #574

Took 13 sec (from Titan)

Stack Trace

"STP_Tests_IPA.ttcn:742 : Timeout waiting for IPA connClosed"
      STP_Tests_IPA.ttcn:779 STP_Tests_IPA control part
      STP_Tests_IPA.ttcn:754 TC_beat_timeout testcase