ROOT context is improperly enabled on mod_cluster when SSO is added to EAP 6

Issue

• Using mod_cluster with EAP 6, we're seeing Apache static content and other requests that shouldn't be proxied to JBoss are proxied to JBoss regardless causing 404s and 503s
• It looks like this started when SSO was added to our web subsystem as this caused the ROOT context to be improperly enabled on mod_cluster
• We saw the ROOT context randomly enabled on one start up but it hasn't repeated on any other restarts.