owners.yaml: Add verifySubsystems.go
David noticed that there were subsystem entries in owners.yaml which had
the same Labels entry name. These entries have been already fixed up but
a test to verify the subsystem entries should be added.
Add subsystem checks to verify that the Labels are unique and that the
subsystem entries are in alphabetical order.
Additional Fix: Update owners.yaml with fixes from verifySubsystems.
These fixes do NOT change any names, etc.
Suggested-by: David Arcari darcari@redhat.com
Signed-off-by: Prarit Bhargava prarit@redhat.com
Edited by Prarit Bhargava