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
Work around pip installed pkgs on Rackspace image

The upstream rackspace image has a bunch of pip installed packages as
cloud-init was installed via pip due to a lack of available system
packages.  This can break further system package installs, such as
markdown, which fails with

---
 Error unpacking rpm package python-markdown-2.4.1-1.el7.noarch
  error: unpacking of archive failed on file
   /usr/lib/python2.7/site-packages/Markdown-2.4.1-py2.7.egg-info: cpio: rename
---

Because that is a directory for the pip-installed package, and a file
in the RPM

Remove all pip installed packages on rackspace images before we start
to work around this.  I have filed an upstream issue with Rackspace
(ticket-id 140804-ord-0000134) and the issue is being worked on.

Change-Id: Id12d175143ed3b8e024d057d65fa67505c08042a
Hide output when configuring apt retry

Change-Id: I063995d52b66e4023e360ba423684753e50a291c
Add swift tempurl support to devstack

This commit adds the ability to automatically set a tempurl key
in swift for service accounts.

Change-Id: I0d5d16c5601d022f034df2cc291106c5dc13511e
Add keepalived, conntrackd as dependencies

Neutron L3 HA blueprint l3-high-availability requires
keepalived and conntrackd in order to work for developers as
well as for functional tests.

Change-Id: Ic32d913c2bc6fae339b4d5ec509a77df5a21de72
Merge "Modify `glance image-create` commands to use openstackclient"
Merge "Add swift tempurl support to devstack"
Merge "Work around pip installed pkgs on Rackspace image"
Merge "Add keepalived, conntrackd as dependencies"
Merge "Hide output when configuring apt retry"