TC_removeMapping_connected RemsimBankd_Tests

Regression

Failing for the past 6 builds since #1740

Took 21 sec (from Titan)

Stack Trace

Timeout expecting disconnect
      RemsimBankd_Tests.ttcn:445 RemsimBankd_Tests control part
      RemsimBankd_Tests.ttcn:362 TC_removeMapping_connected testcase