973838: refresh redhat.repo after register

For cases where register potentially attaches pools
(--auto-attach/--activationkey/--consumerid)
run certlib.update and repolib.update so entitlements
certs are pulled, and redhat.repo is refreshed
immediately.

[This may get obsoleted by fix for https://bugzilla.redhat.com/show_bug.cgi?id=1008016, but
hopefully test cases would still be useful]