Added contrail config services

Added contrail config services which includes

1. contrail api server
2. contrail discovery server
3. contrail svc-monitor server
4. contrail schema transformer
5. contrail neutron plugin (neutron to be configured)
Btw, I was able to configure config services using this code and got the setup tested (basic testing) by one of the QA guy from Juniper Contrail team.