ISPN-3402 Add JDBC Cache Store config to RHQ plugin

* Added JDBC types to rhq
* Had to add fix for map within map for rhq agent code
ISPN-4736 Implement efficient size operation in Hot Rod 2.0

* For local or replicated caches, it queries the cache itself to
calculate size of cache. Persistent stores are taken into account.
* For distributed caches, it uses M/R tasks to get the number of
total keys in the cluster.
ISPN-4470 Remove tabs and fix other formatting issues
ISPN-4470 Implement RemoteCache.size() w/ new Hot Rod size command

* Implement RemoteCache.size() using new Hot Rod 2.0 size operation.
* This provides an accurate element count that works with distributed
caches and persistent stores.
ISPN-4736 ISPN-4470 Size response code should be 0x2A