Minor changes

Hi!
From a recent project some minor modifications

* Aligned ResourceAdapter setters and default deployment descriptor sample files
* Let HazelcastConnection implement Autoclosable to simplify coding with try-with-resource pattern
** This requires Java7, maybe not reasonable for a pull on a maintenance branch
* Added/Adopted deployment descriptors for JBoss7 deployment without global class availability/module configuration
* Added documentation for JBoss7 deployment and sample code
* Organize imports

Best regards,
Sebastian