Description of problem:
From satellite v 6.3 onwards, we are not supporting self-registered satellite server, reference  and 
The foreman-maintain should add this check and notify the users accordingly in pre-upgrade check and ask customer follow upgrade steps for disconnected satellite server.
It will be nice if we could point the KCS / Doc link for the disconnected upgrade.
Version-Release number of selected component (if applicable):
Red Hat Satellite 6.3 Upgrade
We currently do raise a warning if the capsule is self-registered.
So I suppose, the warning should actually be a `failure` and restrict user/admin from upgrading satellite or capsule.
And, this seems to be duplicate BZ https://bugzilla.redhat.com/show_bug.cgi?id=1545136.
Correct, the upgrade should fail and should not continue.
Yeah BZ 1545136 is duplicate of this bugzilla, so we can keep only one.
*** Bug 1545136 has been marked as a duplicate of this bug. ***
Created redmine issue http://projects.theforeman.org/issues/22578 from this bug
Upstream bug assigned to firstname.lastname@example.org
Upstream bug assigned to email@example.com