Add Neutron l3 metering agent
Add Neutron l3 metering agent

This is the agent side of :
blueprint bandwidth-router-measurement
blueprint bandwidth-router-label

This patch initiates agent side by adding a new
l3 metering agent and a Noop Driver.

DocImpact

Change-Id: Ib34721209c282b2669ff5488a33293d9f86467ef

hareeshpc/networking-cisco,Tehsmash/networking-cisco,Gitweijie/first_project,noironetworks/networking-cisco,nikolay-fedotov/networking-cisco,noironetworks/networking-cisco,CiscoSystems/networking-cisco,Tehsmash/networking-cisco,hareeshpc/networking-cisco,Gitweijie/first_project,openstack/networking-cisco,CiscoSystems/networking-cisco,openstack/networking-cisco,cisco-openstack/networking-cisco,cisco-openstack/networking-cisco