Merge pull request #1404 from simonjbeaumont/cp-5881

Update supported vGPU types at startup
Merge pull request #1405 from simonjbeaumont/cp-5881

Don't enable newly discovered vGPU types on startup
Merge pull request #1406 from simonjbeaumont/cp-5840

Database upgrade logic for vGPU support
Fix typo in logging for VGPU.destory

Signed-off-by: Si Beaumont <simon.beaumont@citrix.com>