[WFLY-490] / [WFLY-1965] Upgrade to Remoting JMX 2.0.0.CR1

Also a minor update to only set the CallbackHandler if username/password authentication is actually required as this disabled the local authentication mechanism.
[WFLY-490] / [WFLY-1943] Allow the RunAs role mapping capability even where real role mapping is enabled.

In this case only users with the SuperUser role can request a mapping and even then the roles requested MUST exist.
[WFLY-490] added tests for permissions coverage and role mapping (based on properties file)
[WFLY-1907] / [WFLY-490] The whoami operation needed the reply type setting so that it would be represented correctly in the JMX facade.