Update swift's selinux policies

Allow swift permission to /mnt/state/var/cache/swift.
Allow rsync to write to /mnt/state/var/log/rsyncd.log.

Move directory creation from post-configure.d to configure.d.

Change-Id: I9c8730be8d880229ec3224690f46406d55b2e8e1
Add cinder-lio element

Adds install steps needed for using cinder-lio and makes it
possible to configure the iscsi_helper option in cinder.conf

Change-Id: Ie741845b669621dd5cd481e9de22caea62312af2
Merge "Add cinder-lio element"
Merge "Update swift's selinux policies"