Track neutron instead of quantum in releasestatus

Following the LP project rename, adjust releasestatus's list of
integrated projects accordingly.

Change-Id: I812b7f3a183967d3c1740b61b406b844950a9866
Reviewed-on: https://review.openstack.org/34697
Approved: Jeremy Stanley <fungi@yuggoth.org>
Reviewed-by: Jeremy Stanley <fungi@yuggoth.org>
Tested-by: Jenkins