WFLY-2016 Fix security context propagation for EJB asychronous invocations
WFLY-1812 Web session clustering should not require a RegistryService if sessions aren't being replicated.
Introduce CacheServiceProvider to allow dynamic service installation per clustered cache (like what ChannelServiceProvider does for channels).
Refactor wildfly-clustering-registry into wildfly-clustering-api and wildfly-clustering-server
Remove wildfly-clustering-api dependency on jboss-msc
WFLY-1885 Refactor wildfly-clustering-singleton. Introduce a new builder API and move the actual SingletonService construction and implementation to wildfly-clustering-server
Refactor a separate Group abstraction from CommandDispatcherFactory.  Add channel and cache implementations for channel view vs cache view.
Add NodeFactory and implementations for creating Node objects from a JGroups or Infinispan Address.
Add GlobalComponentRegistryService for use by services that need to ensure an Infinispan cache container's channel is started.
Remove obsolete view stabilization logic from clustering unit tests.
Fix potential memory leak when using Default datasource