Fix typo in cli help
Fix typo in cli help

The help message for neutron floatingip-disassociate should say
the argument is the ID of the floating IP to disassociate

Change-Id: I4564d546ca269ab05199a51ffd11678237a4d56f

JioCloud/python-neutronclient,johnpbatty/python-neutronclient,cryptickp/python-neutronclient,varunarya10/python-neutronclient,mangelajo/python-neutronclient,openstack/python-neutronclient,roaet/python-neutronclient,rackerlabs/rackspace-python-neutronclient,noironetworks/python-neutronclient,eayunstack/python-neutronclient,sajuptpm/python-neutronclient-ipam,eayunstack/python-neutronclient,noironetworks/python-neutronclient,varunarya10/python-neutronclient,NeCTAR-RC/python-neutronclient,Stavitsky/python-neutronclient,Juniper/python-neutronclient,sajuptpm/python-neutronclient-ipam,huntxu/python-neutronclient,roaet/python-neutronclient,huntxu/python-neutronclient,mangelajo/python-neutronclient,NeCTAR-RC/python-neutronclient,cryptickp/python-neutronclient,venusource/python-neutronclient,JioCloud/python-neutronclient,openstack/python-neutronclient,Stavitsky/python-neutronclient,cernops/python-neutronclient,rackerlabs/rackspace-python-neutronclient,Juniper/python-neutronclient,cernops/python-neutronclient,venusource/python-neutronclient,johnpbatty/python-neutronclient