Aligned a few words in the docs
Aligned a few words in the docs

We say "not supported" when the cloud doens't do something, but there
were two places where we used other words. Fix them. Also, make the
image properties a blockquote.

Change-Id: Id933f7d38d706c6fb3ed9f59ad10c2e1e2d73c43

stackforge/python-openstacksdk,stackforge/python-openstacksdk,openstack/python-openstacksdk,dtroyer/python-openstacksdk,dtroyer/python-openstacksdk,openstack/os-client-config,openstack/python-openstacksdk,dtroyer/os-client-config