TC_createMapping_connectClient_changeMapping RemsimBankd_Tests

Regression

Failing for the past 1 build since #1747

Took 12 sec (from Titan)

Stack Trace

Timeout waiting for client being disconnected
      RemsimBankd_Tests.ttcn:447 RemsimBankd_Tests control part
      RemsimBankd_Tests.ttcn:273 TC_createMapping_connectClient_changeMapping testcase