Commands that do not exist appear in help message of nova-manage

[Takashi Natsume]

Description
===========

The following commands do not exist.
But they appear in the help message of nova-manage.

* nova-manage cell parse_server_string
* nova-manage db print_dict

Steps to reproduce
==================

stack@devstack-master:~$ nova-manage cell
usage: nova-manage cell [-h] {create,delete,list,parse_server_string} ...
nova-manage cell: error: too few arguments
stack@devstack-master:~$ nova-manage cell parse_server_string
An error has occurred:
Traceback (most recent call last):
  File "/opt/stack/nova/nova/cmd/manage.py", line 1861, in main
    fn, fn_args, fn_kwargs = cmd_common.get_action_fn()
  File "/opt/stack/nova/nova/cmd/common.py", line 187, in get_action_fn
    missing = validate_args(fn, *fn_args, **fn_kwargs)
  File "/opt/stack/nova/nova/cmd/common.py", line 76, in validate_args
    if six.get_method_self(fn) is not None:
AttributeError: 'function' object has no attribute 'im_self'

stack@devstack-master:~$ nova-manage db
usage: nova-manage db [-h]
                      {archive_deleted_rows,ironic_flavor_migration,null_instance_uuid_scan,online_data_migrations,print_dict,sync,version}
                      ...
nova-manage db: error: too few arguments
stack@devstack-master:~$ nova-manage db print_dict
An error has occurred:
Traceback (most recent call last):
  File "/opt/stack/nova/nova/cmd/manage.py", line 1861, in main
    fn, fn_args, fn_kwargs = cmd_common.get_action_fn()
  File "/opt/stack/nova/nova/cmd/common.py", line 187, in get_action_fn
    missing = validate_args(fn, *fn_args, **fn_kwargs)
  File "/opt/stack/nova/nova/cmd/common.py", line 76, in validate_args
    if six.get_method_self(fn) is not None:
AttributeError: 'function' object has no attribute 'im_self'

Environment
===========

nova master(commit 1148a2d67b70dd767f798e1dfe0b4c7634d2f90c)
OS: Ubuntu 16.04.2 LTS

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/512324

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/512324
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=86a535a2689537d81e8a98a9d28ddf1d233dcddc
Submitter: Zuul
Branch: master

commit 86a535a2689537d81e8a98a9d28ddf1d233dcddc
Author: Takashi NATSUME <email address hidden>
Date: Mon Oct 16 22:45:09 2017 +0900

    Fix nova-manage commands that do not exist

    The following commands do not exist.
    But they appear in help message.
    So fix them.

    * nova-manage db print_dict
    * nova-manage cell parse_server_string

    Change-Id: I7b16b8ab36b9a9ae719bf98a75511d82041d0152
    Closes-Bug: #1723982

[Takashi Natsume (natsume-takashi)]

This bug does not affect stable/pike.

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/nova 17.0.0.0b1 development milestone.