Have CacheManager use JBC to parse configs rather than creating MC beans

The CacheManager currently uses the MC to create beans for each available cache configuration. That ends up creating a lot of MC beans for stuff the MC doesn't really care about. Plus it results in an unfamiliar config format for JBC users. Replace this with standard JBC configurations from the currently optional jboss-cache-configs.xml file that's included in the sar.

For sure when we move to Infinispan it will work this way.