Comment 1 for bug 1837199

I could not reproduce the issue in the following environment.

nova master commit 063ef486e93bbef1628aa722b96bbd86290361cd
nova-manage 19.1.0 (nova-manage --version)
oslo.config 6.11.0
Python 3.6.7

stack@devstack-master:~/nova$ nova-manage cell_v2
usage: nova-manage cell_v2 [-h]
                           {create_cell,delete_cell,delete_host,discover_hosts,list_cells,list_hosts,map_cell0,map_cell_and_hosts,map_instances,simple_cell_setup,update_cell,verify_instance}
                           ...
nova-manage cell_v2: error: too few arguments