fd454706ca
This allows operators to delete large diskimage files after uploads are complete, in order to save space. A setting is also provided to keep certain formats, so that if operators would like to delete large formats such as "raw" while retaining a qcow2 copy (which, in an emergency, could be used to inspect the image, or manually converted and uploaded for use), that is possible. Change-Id: I97ca3422044174f956d6c5c3c35c2dbba9b4cadf