purge-props does not honor property protections

[Michael Turek]

When removing all properties of an image using --purge-props, protected properties are also removed. I saw this behavior using v1 glance-client and v1 api. The documentation for protected properties states:

"Property protections will still be honoured if 'X-glance-registry-Purge-props' is set to 'True'. That is, if you request to modify properties with this header set to `True`, you will not be able to delete or update properties for which you do not have the relevant permissions. Properties which are not included in the request and for which you do have delete permissions will still be removed."

This does not seem to happen. My hope is to restore/create this functionality.

So far, I'm convinced that this is a glance issue rather than a glance-client issue. If it turns out to be otherwise, I will adjust the bug report accordingly.

[Michael Turek (mjturek)]

I realized I had been not been assigning the proper role to my user. The feature appears to be working properly. Updated bug status to 'Invalid'.