HSEARCH-1575 Allow to override the JGroups configuration defined by the Infinispan configuration files
HSEARCH-1558 Upgrade to JGroups 3.5.0.Beta2 and move tests to loopback discovery
HSEARCH-1558 JGroupsCommonTest using the wrong configuration file
HSEARCH-1558 Force usage of IPv4 localhost in our JGroups testing configuration
HSEARCH-1558 Remove default JGroups configuration and rely on the Infinispan default one
HSEARCH-1558 Force Infinispan tests to use the JGroups testing stack
HSEARCH-1558 Cleanup poms from unused system environment variables