[WFLY-490][WFLY-2029] If an attribute has access-type=read-only/metric, make access-control list it with write=false
[WFLY-490] add a small abstraction over various management interfaces (native, HTTP, CLI and JMX)
[WFLY-490] refactor StandardRolesBasicTestCase to use all the management interfaces
[WFLY-490] add a test for runtime reconfiguration of role mapping