At present the maximum number of DHCP or L3 agents per tenant
network is governed by the total number of agents which exist
in the deployment. When using L3 routed pods it may be necessary
to deploy extra DHCP agents, but each of these only has access
to a subset of the networks.
This patch adds optional parameters 'neutron_l3_agents_max' and
'neutron_dhcp_agents_max' which allow the number of agents used
per tenant network to be limited to match the deployment's
requirements.
Change-Id: I80e6206c54cf1876b5c6c273b948718d48d495ca
fb6284b257