Initial qpid development work

* Switch base tower devel image from u14.04 to c7
* Switch container image to build python dependencies into itself
  instead of forcing it to be built on startup
* Upgrade venv pip to 8.1.2
* Neuter queue.py which was heavily tied to redis and was basically
  orphaned code
* Alter local_settings to override default cache settings and use
  memcached
* Alter local settings to refer to qpid instead of redis for celery
  broker
* Purge redis python dependencies and add qpid and memcached
* Update docker-compose to purge redis and add qpid and memcached

tools/docker-compose/proot.repo

@@ -0,0 +1,8 @@
+[jlaska-proot]
+name=Copr repo for proot owned by jlaska
+baseurl=https://copr-be.cloud.fedoraproject.org/results/jlaska/proot/epel-7-$basearch/
+skip_if_unavailable=True
+gpgcheck=1
+gpgkey=https://copr-be.cloud.fedoraproject.org/results/jlaska/proot/pubkey.gpg
+enabled=1
+enabled_metadata=1