Introduce non-static utility to handle classloading hierarchy

In Commons, the FileLookup and CL concepts within Util need replaced by a non-static/non-singleton classloading service. This will run through the following sequence, in order:
1.) OsgiClassLoader (new)
2.) explicit classloader (provided per-operation by AdvancedCache#with(ClassLoader))
3.) Infinispan CL
4.) system CL
5.) TCCL

Since it's not static/singleton, the util instance will need wired into GlobalConfiguration (or elsewhere). The instance will replace the related Util/FileLookup calls.