Avoid KeyError: 'CONFIG_CINDER_VOLUMES_SIZE' error

- When CONFIG_CINDER_VOLUMES_CREATE=n, it should always pass in the cinder
  volume size calculation block.

Change-Id: I6cf6fd4767c66dc87ea31cbafe17bb8fcfebbf70
Fixes: rhbz#1164359
Signed-off-by: Gael Chamoulaud <gchamoul@redhat.com>
Merge "[Neutron] Deprecate ovs and linuxbridge plugins"
Do not create cinder-volumes if not needed

When CONFIG_CINDER_VOLUMES_CREATE=n, Packstack tries to create
cinder-volumes anyway after commit
58bd73af9757e7031aa29d252bc318953c39639d .

Change-Id: I4d385b45024602539c85164d9fe410fda510bab1
Check packstack/version.py for PEP8 issues

Change-Id: If7666db19a2a37c5fb55ad54570cc68c9a9b2ceb
Merge "Do not create cinder-volumes if not needed"
Option to install FreeIPA

Option to setup FreeIPA server and join hosts into IPA. If also SSL for
AMQP or Horizon is enabled it gets all certificates from freeipa.

Currently experimental and unsupported option. Joining FreeIPA domain
requires change of resolver on hosts and mod_ssl colides with mod_nss in
case of running FreeIPA server on Controller node thus making allinone
setup difficult.

Change-Id: I84e0dee07bf3a4066350a66aebb45678a9a316ba
Closes-Bug: rhbz#903645

Conflicts:
	packstack/installer/output_messages.py