Tests for ServiceMBeanSupport's notification capabilities (WFLY-222)
Merge pull request #5869 from jmartisk/master-tests-for-wfly-222

Tests for ServiceMBeanSupport's notification capabilities (WFLY-222)
Refactor single sign-on implementation in org.wildfly.clustering.web.spi/infinispan modules.
Implement distributable SSO support for Undertow.
Initial subsystem work for single sign on