Add a step to clean all ceph references in fstab
Add a step to clean all ceph references in fstab

After run cleanup-containers script, was necessary to
clear references to the ceph in fstab file manually.

Change-Id: I0cd7284b39a5432feff1c314d74cc365b4e5fe0b
Closes-Bug: #1562991
(cherry picked from commit 7f2dd73dcc51cf307c4fa6614898f471d73862a4)

negronjl/kolla,negronjl/kolla,negronjl/kolla