ISPN-3323 Make the RemoteCache.getVersion() method return the actual implementation version

ISPN-3323 Make the RemoteCache.getVersion() method return the actual implementation version
Add a getProtocolVersion() method to return the HotRod protocol version
Fix the HotRod protocol (we're now on 1.2)

https://issues.jboss.org/browse/ISPN-3323