Implement Namespace resolution policy

Perform the following automatic translations:

• foo/bar/baz becomes java:jboss/env/foo/bar/baz
  • if a component is in scope, instead use java:comp/env/foo/bar/baz or java:module/env/foo/bar/baz as appropriate
• java:/foo/bar/baz => java:jboss/root/foo/bar/baz