We need to add more logic to this since it can only be true for one agent in the system.

This is what I have in san3 at the moment, so for our first pass I wanted to make it the same:

# Indicates that this L3 agent should also handle routers that do not have
# an external network gateway configured.  This option should be True only
# for a single agent in a Quantum deployment, and may be False for all agents
# if all routers must have an external network gateway
# handle_internal_only_routers = True