Add aliasing capability to DefaultCacheManager

The JBoss AS impl of the JBC CacheManager supports aliasing of cache configuration names. DefaultCacheManager can do the same. Helpful for preserving configuration compatibility across releases, e.g. an EJB3 bean class annotated with @CacheConfig(name="jboss.cache:service=EJB3SFSBClusteredCache") to work in AS 4.2 still works in AS 5 because I made "jboss.cache:service=EJB3SFSBClusteredCache" an alias for "sfsb-cache".

This doesn't affect the CacheManager API; it's an implementation detail; just inject a map of aliases and then resolve any unknown configuration names against it.