enable -h | --help after command to show the command usage.
enable -h | --help after command to show the command usage.

Bug #1023260

we caculate the position of -h|--help and command, if -h|--help
is after command, we replace the command with 'help' command.
Change-Id: Ieb5fc9d37daafd704edb71e35b74dbf83cb69a4c

johnpbatty/python-neutronclient,citrix-openstack-build/python-neutronclient,JioCloud/python-neutronclient,Stavitsky/python-neutronclient,ntt-sic/python-neutronclient,sajuptpm/python-neutronclient-ipam,huntxu/python-neutronclient,noironetworks/python-neutronclient,vichoward/python-neutronclient,vichoward/python-neutronclient,Stavitsky/python-neutronclient,yamahata/python-tackerclient,metacloud/python-neutronclient,cernops/python-neutronclient,CiscoSystems/python-neutronclient,akushwah/python-quantumclient-n1kv,openstack/python-neutronclient,redhat-openstack/python-neutronclient,cernops/python-neutronclient,CiscoSystems/python-neutronclient,citrix-openstack-build/python-neutronclient,varunarya10/python-neutronclient,roaet/python-neutronclient,redhat-openstack/python-neutronclient,cryptickp/python-neutronclient,eayunstack/python-neutronclient,asadoughi/python-neutronclient,mangelajo/python-neutronclient,sajuptpm/python-neutronclient-ipam,Juniper/python-neutronclient,johnpbatty/python-neutronclient,rackerlabs/rackspace-python-neutronclient,rackerlabs/rackspace-python-neutronclient,mangelajo/python-neutronclient,roaet/python-neutronclient,ntt-sic/python-neutronclient,huntxu/python-neutronclient,metacloud/python-neutronclient,asadoughi/python-neutronclient,NeCTAR-RC/python-neutronclient,venusource/python-neutronclient,eayunstack/python-neutronclient,noironetworks/python-neutronclient,NeCTAR-RC/python-neutronclient,yamahata/python-tackerclient,vijayendrabvs/ssl-python-neutronclient,CiscoSystems/python-quantumclient,JioCloud/python-neutronclient,varunarya10/python-neutronclient,CiscoSystems/python-quantumclient,akushwah/python-quantumclient-n1kv,cryptickp/python-neutronclient,openstack/python-neutronclient,Juniper/python-neutronclient,venusource/python-neutronclient,vijayendrabvs/ssl-python-neutronclient