Update Hotrod client version number

BasicCache.getVersion() is documented to return "the version of Infinispan", but RemoteCacheImpl.getVersion() returns Version.getProtocolVersion() (which is "1.0").

I think there should be a separate method to return the protocol version, and RemoteCacheImpl.getVersion() should return the Infinispan version (with a hook in the release script to update it automatically).

Version.getProtocolVersion() should also be updated to "1.2".