Remove dependency on python-quantumclient
Remove dependency on python-quantumclient

 * quantum previously depended on python-quantumclient for the
   functionality in quantum/common.  This change migrates
   the required modules to the quantum repo and removes that
   dependency.
 * Addresses bug 977711

Change-Id: Ia17a486859eb1aa993900a5f3b582b258c6a6d78

gandelman-a/neutron-lbaas,CiscoSystems/networking-odl,gaolichuang/neutron-fwaas,openstack/neutron-vpnaas,flavio-fernandes/networking-odl,gotostack/neutron-lbaas,openstack/networking-odl,mestery/x-stackforge-odl,openstack/neutron-fwaas,openstack/networking-odl,schoksey/networking-odl,citrix-openstack-build/neutron-vpnaas,dougwig/x-neutron-fwaas,gandelman-a/neutron-lbaas,FedericoRessi/networking-odl,openstack/neutron-vpnaas,citrix-openstack-build/neutron-fwaas,openstack/neutron-fwaas,gandelman-a/neutron-lbaas,CiscoSystems/networking-odl,flavio-fernandes/networking-odl,gaolichuang/neutron-fwaas,openstack/networking-odl,dougwig/x-neutron-lbaas,schoksey/networking-odl,dougwig/x-neutron-vpnaas,gotostack/neutron-lbaas,citrix-openstack-build/neutron-lbaas,gotostack/neutron-lbaas,FedericoRessi/networking-odl