Add os-client-config to CLI usage
Add os-client-config to CLI usage

Change-Id: I5d4a3d7206c8f90f479047e8ee810496c06022d9

huntxu/python-neutronclient,rackerlabs/rackspace-python-neutronclient,huntxu/python-neutronclient,Juniper/python-neutronclient,noironetworks/python-neutronclient,openstack/python-neutronclient,noironetworks/python-neutronclient,rackerlabs/rackspace-python-neutronclient,eayunstack/python-neutronclient,Juniper/python-neutronclient,eayunstack/python-neutronclient,openstack/python-neutronclient