Comment 1 for bug 1210467

ok so having now looked into this, it looks like the problem is that the Glance V2 image schema does not contain purge_props. I think this is actually a bug in Glance since as a result, there is now no way to purge properties (actually default in Glance is True so there is no way to disable pure_properties). I think we should disable this property for v2 call in cinder for now and I will raise a separate issue on Glance.