CAMEL-2624 Updated Mina2Consumer. Uncommented logging code.
Mina2ClientServerTest - Added tests using IOHandlers to receieve message responses and close connections. The sync attribute is only used in the request-reply pattern and must be set to false when using full asyc pattern with IOHandlers.
Mian2NoResponseFromServerTest - Changed expected bodies from 0 to 3. Session created, session opened and session closed events generate exhanges with null bodies.