DeploymentTestCase.testFilesystemScannerRegistration fails intermittently

https://ci.wildfly.org/project.html?projectId=WildFlyCore_PullRequest&testNameId=5510538220891037036&tab=testDetails

I fear this has something to do with the capability registry and nothing to do with the scanner itself. It started happening when I added a capability to the scanner so it could consume a capability for the path it references.

The test does a quick add/remove/add of a scanner resource and it's the 2nd add that fails with a dupicate capability error. But the remove mean the dup is gone. It's intermittent so I fear some race, but there's nothing obvious.