Comment 2 for bug 1135537

After giving this some thought, I don't think we should fix this bug by simply porting the cache management to v2.

Cache management is an inherently local action, and doesn't make sense living alongside the v2 api which reports status for coarser entities like regional store or the glance db.

Rather than fixing this bug, I think we should put together a blueprint for exposing cache management outside of the main glance api.