98d735d058
JIRA: https://jira.spring.io/browse/INT-3336 Previously exceptions thrown in a flow downstream of a message-driven-channel-adapter were not logged and thrown back to the client, causing the connection to drop and reconnect. Add `error-channel` to the adapter to allow normal error handling. If no error channel, catch and log the unhandled exception. Add `adapter.stop();` in the end of 'real' tests to close the mqtt-connection