Thanks for releasing the new neutronclient. neutronclient 2.2.6 has basic FWaaS and VPNaaS support.
Last week I looked around Neutron related Horizon reviews. I will prioritize the community feature review (i.e. FWaaS and VPNaaS patch) this week.
H3 items
FWaaS support (KC) -- Becoming good shape, but it seems more test in real environment.
VPNaaS support (Tatyana) -- Now catching up with the lastest VPNaaS change. It may be FFE candidate or delayed to IceHouse. It depends on VPN implementation status in Neutron (driver patch still in review).