CDC adapter: mxs_adapter can't be shut down properly

Exiting from the process doesn't work properly.
1. User starts the process.
2. User wants to finish the process with CTRL+C

Result:
Message "Shutting down..." is displayed and it stays forever.
Only way to exit the process is to kill it.
Also killing the process leaves table locked by mcsapi and table can't be deleted or truncated.

Expected:
Process must shut down properly and release the table lock.