BZ #1130304 - nfs-utils should be installed before using nfs

https://bugzilla.redhat.com/show_bug.cgi?id=1130304

Make sure nfs-utils is installed and the selinux bit flipped (if
applicable) before attempting to nfs mount something in glance or
cinder.
Is this a spot where we might want to use contain instead?  I think if so, this would change to:
  contain ::quickstack::nfs_common
  ::Quickstack::Nfs_common -> Cinder::Backend::Nfs<| |>