When adding the REST protocol integration there was a change to fail if neither the Undertow or REST subsystems were not found on the deployment. However, this should not fail. For example in WildFly there is a test org.jboss.as.test.integration.deployment.excludesubsystem.ExcludeEESubsystemTestCase which excludes Undertow causing this check to fail since there are also no REST resources.

Previously this had a check to see if the failure was just due to the missing Undertow subsystem. if it was, it just succeeded and no context was registered. We should revert back to this behavior and likely add a test as such.