[WIP] BGP Dynamic Routing

Client changes for new BGP commands. Current new commands are:

* dr-agent-peer-add
* dr-agent-peer-remove
* routingpeer-list-on-dr-agent
* routinginstance-list':
* routinginstance-create
* routinginstance-delete
* routinginstance-show
* routinginstance-update
* routinginstance-network-add
* routinginstance-network-remove
* routinginstance-network-list
* routinginstance-agent-add
* routinginstance-agent-remove
* routinginstance-agent-list
* routingpeer-create
* routingpeer-delete
* routingpeer-list
* routingpeer-show
* routingpeer-update

Command names are quite self-explanatory.

Change-Id: I7b6f8ad36290d6edbd0563531dfd7c7a3c37b3e9