This deprecates all of the image CLIs/python API bindings that use
the Nova os-images API which is a proxy to the Glance v1 API.
This will emit a warning each time a deprecated CLI/API is used and also
updates the help docs for the deprecated CLIs and docstrings for APIs.
The plan is to do a release once this is merged so people start seeing
it and then we'll actually remove the deprecated CLIs/APIs in the first
python-novaclient release after the Nova server 15.0.0 'O' release.
Depends-On: Iff5fb3180855de7adb3399f6be16bedc8543b4ec
Change-Id: I3f60cc7f4c6e27861c4a84b925d573f35f1a1848
a602e59806