Updated openstack/openstack
Project: openstack-dev/devstack  a3ecab6618cb7c9ca8089d8b24ac503ed5a719e7

Modify `glance image-create` commands to use openstackclient

Change `glance image-create` commands to use `openstack image create`,
in an effort to unify the CLI.

Change-Id: I96cef118daf931b648c0483525ac7d2287fec2e0