user/cli doc is broken

[Goutham Pacha Ravi]

The document generated on https://docs.openstack.org/python-manilaclient/latest/user/shell.html
is broken. The sphinx directive to fetch the output of `manila help` isn't working.

It produces this text in the doc:

Run manila help to get a full list of all possible commands, and run manila help <command> to get detailed help for that command.

System Message: ERROR/6 (/home/zuul/src/git.openstack.org/openstack/python-manilaclient/doc/source/user/shell.rst, line 51)

Command 'manila --help' failed: [Errno 2] No such file or directory: 'manila': 'manila'

This used to work when the patch that introduced this merged: https://review.openstack.org/#/c/595362/

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/645994

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/645994
Committed: https://git.openstack.org/cgit/openstack/python-manilaclient/commit/?id=624265ade6b10f46e42cd9eb84c99b5e25264c31
Submitter: Zuul
Branch: master

commit 624265ade6b10f46e42cd9eb84c99b5e25264c31
Author: Tom Barron <email address hidden>
Date: Sat Mar 23 08:16:44 2019 -0400

    [doc] Fix command output generation

    Install manila command in the tox virtual environment
    for docs so sphinx can run ``manila`` to generate its
    help output.

    Closes-bug: #1821389
    Change-Id: I0bb221006842f3b40609753133c4203bc38fdffa

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/stein
Review: https://review.openstack.org/652780

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/652780
Committed: https://git.openstack.org/cgit/openstack/python-manilaclient/commit/?id=8fd35a396e51f1c0d5d1f05a5e0e0feff739c5ae
Submitter: Zuul
Branch: stable/stein

commit 8fd35a396e51f1c0d5d1f05a5e0e0feff739c5ae
Author: Tom Barron <email address hidden>
Date: Sat Mar 23 08:16:44 2019 -0400

    [doc] Fix command output generation

    Install manila command in the tox virtual environment
    for docs so sphinx can run ``manila`` to generate its
    help output.

    Closes-bug: #1821389
    Change-Id: I0bb221006842f3b40609753133c4203bc38fdffa
    (cherry picked from commit 624265ade6b10f46e42cd9eb84c99b5e25264c31)

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/python-manilaclient 1.28.0 release.

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/python-manilaclient stein-eol release.