1) makes bifrost unbuildable as it evolves rapidly at the moment
2) makes neutron bootstrap/upgrade only the core service [1]
1) will be reverted
2) will be made more flexible
[1] https://bugs.launchpad.net/bgpvpn/+bug/1894056
Change-Id: I1eefcfceded985b5f61ee8d796f9d8994c9ee97c