[rocky] Handle agent's options

* agent_down_time
* dhcp_agents_per_network
* allow_automatic_dhcp_failover
* rpc_conn_pool_size
* rpc_thread_pool_size
* rpc_response_timeout
* report_interval

Change-Id: Ib60c93abe33d57747895713d045759170bb56af6
Related-Prod: PROD-26334
Related-Prod: PROD-26314
2 files changed