[WFLY-3154] : Operation which require server reload should check if some...

...thing was changed.

Adding tests and modifying ReloadRequiredWriteAttributeHandler.
In the implementation we are comparing currentValue which is not a resolved with resolvedValue, this is done on purpose.
As the context might have changed we can't resolve currentValue being sure that the resolved value is the effective value.

Jira : https://issues.jboss.org/browse/WFLY-3154
BZ: https://bugzilla.redhat.com/show_bug.cgi?id=976228