Update all branches to Liberty-2.
Also, as of Change ID I3823900bc5aaf7757c37edb804027cf4d9c757ab
the new neutron releases have a new db upgrade and stamp process
in order for these version to be rev'd we need to incorporate
those change. As such the neutron_db_setup.yml has been updated
along with the neutron `neutron_db_revision` default variable.
Change-Id: Icfb75d377498e288e67be1a8bc049b42d8aa57b1