Convert some prints to addDetails calls.

If instead of using print, we use testtools details, we can capture the data
sensibly in the subunit output stream. That way, we can make good display
decisions about the data to be shown in the HTML reports as needed.

Part of blueprint grizzly-testtools

Change-Id: I125b0bf60591ec3c854aa757b370a1c3573a40d2
Image Member Domain Model

This commit is the first layer of image member domain model.
The can_share feature from v1 of glance api will not be
ported to glance v2 api.

Related to bp glance-api-v2-image-sharing

Change-Id: Ibfb790d438efb0f5b29b4786c02f1155962150c5
Merge "Convert some prints to addDetails calls."
Merge "Image Member Domain Model"