rpms: Add quota upgrade scripts to rpms

Also replace /tmp/quota-config-backup with /var/tmp/glusterfs/quota-config-backup
in doc and upgrade scripts.

Change-Id: I289662300d32f75e2fc6e789037c3224054a38a5
BUG: 969461
Signed-off-by: Krutika Dhananjay <kdhananj@redhat.com>
Reviewed-on: http://review.gluster.org/7401
Reviewed-by: Humble Devassy Chirammal <humble.devassy@gmail.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Niels de Vos <ndevos@redhat.com>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>