labsnfs: Transition class for switch to Labs NFS

This overrides LDAP autofs setup to transition to NFS storage
for a project; most of this will end up in LDAP from OpenStack
in the future.

Change-Id: Id838b76e21d8fab11462d99f892b86c1aeb9f6d4
Merge "labsnfs: Transition class for switch to Labs NFS" into production