Register extraroute extension
Register extraroute extension

Closes-Bug: #1513053
Change-Id: I0a9678d2659d22194334102c3146316dea637afa

openstack/networking-plumgrid,msagheer/networking-plumgrid,openstack/networking-plumgrid,msagheer/networking-plumgrid,stackforge/networking-plumgrid,stackforge/networking-plumgrid