ISPN-4328 Upgrade JGroups to 3.5.0.Beta7

* Update TEST_PING to the new Discover interface
* group_addr field changed to cluster_name
* add is_coord to PingData response
ISPN-4129 Inlcude Query, CDI, JCache and the LevelDB and REST cachestores to the AS modules

* Splitted as-modules in embedded and client
* Added JPA cache store too
ISPN-4302 Set default isolation level to READ_COMMITTED in server

* also remove unnecessary configuaration elements which are same as default values
* throw a warning if isolation attribute is specified
ISPN-4313 Don't start the HotRod endpoint if client certs were requested
but a trust-store was not enabled in the security realm
ISPN-4316 Don't attempt to obtain the peer SSL certificate if client
certificates were not enabled