Provide programmatic access to RemoteCacheManager configuration data

RemoteCacheManager can have properties passed to it via a number of constructors, but once the object is constructed, there is no means to view the properties in effect.

At a basic level, just having a getter method for the ConfigurationProperties instance would be a big help for developers who want to check the properties in effect. This instance is cuurently private with no hope of access as far as I can tell, even via reflection.

At a more advanced level, being able to check the set of properties, then stopping, resetting a property and restarting the RemoteCacheManager instance doesn't seem all that unreasonable.