the docs build job failed

[hongbin]

The docs build job failed with the following error (
example: https://zuul.opendev.org/t/openstack/build/abfed232826944c3a206ffa2af0832ad):

Using openstackdocstheme Sphinx theme from /home/zuul/src/opendev.org/openstack/zun-ui/.tox/docs/lib/python3.6/site-packages/openstackdocstheme/theme
building [mo]: targets for 0 po files that are out of date
building [html]: targets for 5 source files that are out of date
updating environment: [new config] 16 added, 0 changed, 0 removed
reading sources... [ 6%] configuration/index
reading sources... [ 12%] contributor/api
reading sources... [ 18%] contributor/api/modules
reading sources... [ 25%] contributor/api/zun_ui
reading sources... [ 31%] contributor/api/zun_ui.api
reading sources... [ 37%] contributor/api/zun_ui.content
reading sources... [ 43%] contributor/api/zun_ui.content.cloud_shell
reading sources... [ 50%] contributor/api/zun_ui.content.container
reading sources... [ 56%] contributor/api/zun_ui.content.container.capsules
reading sources... [ 62%] contributor/api/zun_ui.content.container.containers
reading sources... [ 68%] contributor/api/zun_ui.content.container.hosts
reading sources... [ 75%] contributor/api/zun_ui.content.container.images
reading sources... [ 81%] contributor/api/zun_ui.enabled
reading sources... [ 87%] contributor/index
reading sources... [ 93%] index
reading sources... [100%] install/index

/home/zuul/src/opendev.org/openstack/zun-ui/.tox/docs/lib/python3.6/site-packages/setuptools/depends.py:2: DeprecationWarning: the imp module is deprecated in favour of importlib; see the module's documentation for alternative uses
  import imp

Warning, treated as error:
autodoc: failed to import module 'client' from module 'zun_ui.api'; the following exception was raised:
cannot import name 'list_extensions'
ERROR: InvocationError for command /home/zuul/src/opendev.org/openstack/zun-ui/.tox/docs/bin/sphinx-build -W -b html doc/source doc/build/html (exited with code 2)

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/691490

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/691490
Committed: https://git.openstack.org/cgit/openstack/zun-ui/commit/?id=a2d9d35b3b772055aa3375496a174b475e0c62db
Submitter: Zuul
Branch: master

commit a2d9d35b3b772055aa3375496a174b475e0c62db
Author: Hongbin Lu <email address hidden>
Date: Sat Oct 26 20:32:00 2019 +0000

    Disable auto-generate API docs

    First, the autodoc build is failing. Second, zun-ui is a horizon
    plugin so auto-generated api docs don't seem to have much value.
    This commit removes autodoc extension which basically stops
    auto-generated API docs.

    Change-Id: I3687a2b46fa524bb902bf8031c4d77945fb0c216
    Closes-Bug: #1849990

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/train
Review: https://review.opendev.org/691493

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/691493
Committed: https://git.openstack.org/cgit/openstack/zun-ui/commit/?id=7ae5b1132360145e9464e6dd7b1d21a99261d420
Submitter: Zuul
Branch: stable/train

commit 7ae5b1132360145e9464e6dd7b1d21a99261d420
Author: Hongbin Lu <email address hidden>
Date: Sat Oct 26 20:32:00 2019 +0000

    Disable auto-generate API docs

    First, the autodoc build is failing. Second, zun-ui is a horizon
    plugin so auto-generated api docs don't seem to have much value.
    This commit removes autodoc extension which basically stops
    auto-generated API docs.

    Change-Id: I3687a2b46fa524bb902bf8031c4d77945fb0c216
    Closes-Bug: #1849990
    (cherry picked from commit a2d9d35b3b772055aa3375496a174b475e0c62db)