HSEARCH-1692 Set the context classloader to the Search/Infinispan integration module when parsing an Infinispan configuration file

Backported from 5.0 HSEARCH-1692
HSEARCH-1692 Make sure our tests cover the need for setting the TCCL when starting Infinispan

Backported from 4.5 HSEARCH-1692
HSEARCH-1692 Run Arquillian based JBossEAP integration tests in real clustered mode by starting a second node

Backported from 4.5 HSEARCH-1692
WFK2-748 Fully align Infinispan integration module with branch JDG compatible branch (4.5)
WFK2-748 Specify the JDG 6.3.1 specific version of Infinispan
WFK2-748 Download and unpack the JDG modules to run the Integration Tests
WFK2-748 Produce modules which integrate with the JDG 6.3 slot of Infinispan
Experimenting with Arquillian options
Arquillian container version needs to be aligned with JBoss EAP version