A little cleanup & detailed test for invoking restricted operations

Hi Brian,

I did a little cleanup, mainly reformatting imports according to WildFly coding standard. I also added one new test for invoking restricted operations; it's similar to BasicRbacTestCase, but it goes into much more detail. In both cases, the "auditor" and "superuser" roles are not covered, because AuditConstraint is still not implemented properly. Hope that this comes soon :-)

Thanks!

LT