Statistics Resources are being created without a corresponding ManagementResourceRegistration

While working on WFCORE-2286 I discovered that there are resources in the tree, at least on the DC, for which there is no corresponding MRR. I believe pferraro@redhat.com in some recent work he's done has stumbled on a similar thing.

I found there were no MRRs for

/profile=/subsystem=messaging-activemq/server=/pooled-connection-factory=*/statistics=pool
/profile=/subsystem=datasources/data-source=/statistics=jdbc
/profile=/subsystem=datasources/data-source=/statistics=pool

I expect the latter two would be repeated for xa-data-source=*

Probably the lack of MRR is correct and the problem is the existence of the resource.