features/quota: regression tests on general functionality of quota

Change-Id: Ie8fd9d21f3a8644ce4d6f6cb887c101451cec10c
BUG: 919998
Signed-off-by: Varun Shastry <vshastry@redhat.com>
Reviewed-on: http://review.gluster.org/4657
Reviewed-by: Amar Tumballi <amarts@redhat.com>
Reviewed-by: Jeff Darcy <jdarcy@redhat.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>