[ARQ-1384] Introduced TomEE profile
* JPA initialization as part of deployment process, instead of during first entity manager call
* Fixed SQL scripts to be compliant with OpenJPA
* New TomEE profile (managed)
* Removed JTA extension as default dependency. TomEE has its' own implemenation, therefore JTA extension added on profile basis (when needed)
* Upgraded shrinkwrap-resolver to 2.0.0-beta-2, as 1.0 conflicts with TomEE
[ARQ-1384] Improved DatabaseConnection handling. It's not shared per test class, but each injectable field has its' own instance.