Koushik Das ab7c9e4098 CLOUDSTACK-8655: [Browser Based Upload Volume] Partially uploaded volumes are not getting destroyed as part of storage GC
As part of volume sync, that runs during of SSVM start-up, the volume_store_ref entry was getting deleted. Volume GC relies on this entry to move volume to destroyed state.
Since the entry was getting deleted, GC thread never moved the volume from UploadError/UploadAbandoned to Destroyed. Fix is to not remove the volume_store_ref entry as part
of volume sync and let GC thread handle the clean up.

This closes #611
2015-07-22 19:05:47 +05:30
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