[WFLY-3667] Remove EJB default permissions concept

As per https://issues.jboss.org/browse/WFLY-3667 I think introducing these permissions was an error and is never desirable in a security manager situation.  This PR removes the permissions and makes the corresponding enable/disable attribute a no-operation.
Yeah apparently shrinkwrap has a descriptors thingy that might be applicable, but I was hesitant to drag in more crap to the test suite.  I wouldn't mind having this factored into some utility though I guess.