Adds Brocade Plugin implementation
Adds Brocade Plugin implementation

blueprint brocade-quantum-plugin

This plugin is meant to orchestrate Brocade VCS switches
running NOS, examples of these are:
   1. VDX 67xx series of switches
   2. VDX 87xx series of switches

Change-Id: Ia8c91ba0e70d3dc7fa79e7f0e09f869542846954

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