Avoid l3_hamode_db when creating HA router
Avoid l3_hamode_db when creating HA router

This avoids create_router() from calling the l3_hamode_db's method,
which assumes we're running agent-based HA and does some setup
and enforces agent checks.

Partially-implements: blueprint appliance-ha

Change-Id: Icbca3966901d22978bd987faa00b0f48d5e453bb

stackforge/akanda-neutron,openstack/akanda-neutron