Recent Glance v2 hides images that are shared but not accepted. The
way to see them is to send member_status=all, which is a bit low-level
for a shade user to need to know.
Add a show_all to list_images that defaults to False so that behavior
doesn't change. Don't add it to search_images, because at the
search_images level the user has the ability to pass in whatever filters
they want.
Change-Id: Ida2ea943168f5be56a60a94576bdcc6c8e1a9d24
54d6e1d184