Make domain mode work in core distribution
[WFLY-2838] Make "cpu" the default mod_cluster load metric
WFLY-2817 MailSessionDefinitionAnnotationParser throws NPE
WFLY-2596 Web JASPIC fixes:

- Adds a JASPICSecurityContext that provides implementation of HttpServletRequest.login() and logout() methods according to the spec;
- Changes JASPI mechanism to use a ConduitWrapper in order to ensure secureResponse() is called before the response is committed;
- Implements logic to handle the javax.servlet.http.registerSession scenario.
Expose 2 more listener configuration options
Add gzip filter support
Upgrade Undertow 1.0.0.CR2
WFLY-918 - initial metrics implemenation
WFLY-2853 - Ignore test