Drop Barbican from the tree

We're not ready to support barbican yet, so it's just dead code.
Removing it until we're ready, at which time we can use git history to
find these things.
upload our test image as public

A public image allows non-admin tenants to make use of the image for
testing, like with rally. The upstream version of glance_image for a
while has supported making the image public. We don't use the locally
added cacert option any more so we don't need to carry our own
glance_image.
Merge pull request #644 from blueboxgroup/no-barbican

Drop Barbican from the tree
Merge pull request #641 from blueboxgroup/public-cirros

upload our test image as public
Check to make sure the cirros image is public