- Ceph images are not being built when using depends-on a kolla build
  job.
- Sync inventory files with current ones which causes ceph to fail due
  missing groups.
- Small corrections in ceph config.yml syntax.
- fix preparse the disk only once
- enable ceph nfs only when enable_ceph_nfs is true

Co-Authored-By: Jeffrey Zhang <zhang.lei.fly@gmail.com>
Change-Id: Id0c7963bf59e2af4944834dcd16589a638e78ba5