RHQ JMX does not support multiple cache managers properly

The JMX RHQ pluging currently queries all cache managers and lumps them together. Thus if you have multiple cache managers in separate domains they all show as 1 cache manager with all the caches for each underneath it. We need to separate each cache manager by domain in the plugin so that each can be administered separately.

It appears the CacheManagerDiscovery lumps all the managers by type in createDiscoveredResources. We would then have to change the CacheManagerComponent to properly query the specific mbean.