With recent support for maintenance task MBeans exposed for secondary stores via
OAK-4978 its now possible to have multiple implementations of RevisionGCMBean present in same setup.
However o.a.j.o.management.RepositoryManager implementation only supports single implementation by design. This needs to be updated to support
- Looking up RevisionGCMBean which does not have role OSGi property defined
- Expose a management op like startRevisionGCForRole