Bug 908795 - [RFE] The JMX plugin should be able to use JBoss Remoting 3 to connect to EAP6 using JSR-160 remoting

Added new connection metadata (ConnectionTypeDescriptor classes) for:
* AS7 and EAP6.0
* EAP6.1 and above
* Wildfly 8

Added new connection templates for JMX server manual process

Refactored JMX plugin itests

Added itests for AS7 and Wildfly 8 in standalone mode
-> Added the Maven plugins for AS7 and Wildfly 8 in order to start standalone servers
-> add-user script is through an ANT tasks to support both UNIX-like systems and Windows systems