Many organizations don't require specific subscriptions to get
updates (called "simple content access"). At the moment,
those systems get an error when registering.
subman: Force re-subscribe if the admin already subscribed
It's possible for an admin to to half-enroll the system with RHN,
using the CLI tools.
Meaning, it's possible for them to register the system with the
service, but not attach to a purchased license for the machine,
the, so called, entitlements.
The subman module always does both halves of the registration process
in lock step. This means, if an admin tries to register using GNOME
while in a half-registered state, subman will fail because the first
step, the registration step, is already finished.
This commit addresses that problem by trying to unregister up front
before registering.
subman: Handle subscription-manager giving invalid status better
subscription-manager potentially returns status messages that the
subman plugin treats as enum values translated in some unknown
other language. It could be tied to system locale, or due to a
caching bug a previous locale used.
This commit tries to work around that bug, by instead relying on
the GetUUID() method and valid attribute. If there's no UUID we
know the system is unregistered. If there's a UUID but the valid
attribute is FALSE we know the system is registered, but hasn't
got proper entitlements.
