Move jndi implementation independent utilities to common module

A number of dependencies on the server module and jboss.jar are simply based on using the jndi implementation independent classes like org.jboss.naming.

{ENCThreadLocalKey,NonSerializableFactory,Util}

. These should simple be moved to the common module for inclusion into the jboss-common.jar under a new org.jboss.util.naming package, and the existing classes made noop subclasses of the common version for backward compatibility.