get rid of GlusterFS on deployment-prep labs project

GlusterFS NEVER worked properly on the deployment-prep project, possibly
because it has to interact with a lot of small files constantly and
access to huge data / file hiearchy.

Ideally we could publish the automount configuration in the LDAP
configuration but that is not possible on a per project basis. Since I
do not want people to remember to check the role::labsnfs class whenever
they create an instance, it is easier to have the class included from
base.pp.

This is definitely ugly, and will need to be removed whenever we get rid
of Gluster for real.

Change-Id: I1428f2363e1498bf6630cc4b9174fbdedf3ab2de
Merge "get rid of GlusterFS on deployment-prep labs project" into production