CP-5881: Don't enable new vGPU types on startup

If new vGPU types become supported then don't enable them by default (doing so
might mess up a users reservation plans).

Signed-off-by: Si Beaumont <simon.beaumont@citrix.com>
CP-5881: Disable any newly-unsupported vGPU types

If vGPU types become unsupported (as a result of uninstalling the necessary
rpms from the vGPU vendor) then we should remove those types from the enabled
types of the PGPU.

Signed-off-by: Si Beaumont <simon.beaumont@citrix.com>
Merge pull request #1405 from simonjbeaumont/cp-5881

Don't enable newly discovered vGPU types on startup