Moved exception raising to get_localhoist_ip

Change-Id: If2a55b844d3c6678d37a1f2598df0f229956d0d9
Fixes: rhbz#977281
Inform about support only on RHEL

Change-Id: I66fabfd64284295e1417809948db57eef1b713f0
Fixes: rhbz#975913
Merge "Moved exception raising to get_localhoist_ip"
Merge "Inform about support only on RHEL"
Added net.bridge.bridge-nf-call*=1 for --allinone installation

Change-Id: Ia8c86dcb31810a8d6b133a161388604fde9bead4
Fixes: rhbz#981144
Merge "Added net.bridge.bridge-nf-call*=1 for --allinone installation"
Changed the repository for the neutron submodule

Change-Id: I9a238c769bfa577e31d2229e5ee60b8cad98dc7a
Fixes: rhbz#998286