zuul flake8 failing tox for stx/update

[Al Bailey]

Brief Description
-----------------
  ON Dec 13, a new version of hacking (2.0.0) was released which is used by flake8 to determine which checks are performed. Some of these new checks are failing flake8 for cgcs_patch in stx/update

 No one will be able to submit any code in stx/update until this is fixed, since the zuul flake8 job will fail.

 The fix should probably be to "clamp" the version of hacking in test-requirements.txt.

Severity
--------
Major - It needs to be fixed, but there are no outstanding reviews in stx/update so no one is blocked (yet).
The fix should probably be ported back to other branches, otherwise any cherry-picks to those branches will also fail zuul.

Steps to Reproduce
------------------
Submit a benign code change (like in a comment) in stx/update to trigger zuul to run.

Expected Behavior
------------------
Zuul should pass

Actual Behavior
----------------
Zuul is failing.

Reproducibility
---------------
100% of the time (since Friday).
It is also reproducable in a designer env if you "flush" your .tox folder under stx/update/cgcs-patch

System Configuration
--------------------
Designed setup

Branch/Pull Time/Commit
-----------------------
Master (or R3, or any previous branch) since Friday Dec 13.

Last Pass
---------
Thursday Dec 12.

Timestamp/Logs
--------------
ERROR: flake8: commands failed

Test Activity
-------------
Developer Testing

[Al Bailey (albailey1974)]

This submission triggered the failed zuul job.
https://review.opendev.org/#/c/699218/

I will update that review to include the fix.

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/699218
Committed: https://git.openstack.org/cgit/starlingx/update/commit/?id=5d2da5d041028afa916149da660809ca6fc4fb73
Submitter: Zuul
Branch: master

commit 5d2da5d041028afa916149da660809ca6fc4fb73
Author: Al Bailey <email address hidden>
Date: Mon Dec 16 08:48:14 2019 -0600

    Fix zuul tox flake8 failures from newer version of hacking

    A newer version of hacking was released which enables additional
    checks and is breaking flake8 and zuul.

    Hacking has now been clamped at 2.0.0 in test-requirements.txt
    Added the same for patch-alarm, although it was not failing.

    The new checks that are fixed are:
     H106: Don't put vim configuration in source files
     W605 invalid escape sequence
     F632 use ==/!= to compare str, bytes, and int literals
     F841 local variable is assigned to but never used

    The following flake8 extension check has been removed:
     H904 Delay string interpolations at logging calls

    Closes-Bug: 1856585
    Change-Id: I8bdc94539f4a6ce243c4e30efc07eed3bad1ce62
    Signed-off-by: Al Bailey <email address hidden>

[Ghada Khalil (gkhalil)]

Marked for stx.2.0 & stx.3.0 given zuul can fail for those branches as well.

@Al, please cherry-pick the change to these branches at your earliest convenience.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: r/stx.3.0
Review: https://review.opendev.org/702942

[Ghada Khalil (gkhalil)]

After further discussion with Al Bailey, I'm removing the stx.2.0 tag as the repo in question doesn't exist in that release.

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/702942
Committed: https://git.openstack.org/cgit/starlingx/update/commit/?id=ecd5a624e22d1a81d44c84bf1e0192dd3af3ad0d
Submitter: Zuul
Branch: r/stx.3.0

commit ecd5a624e22d1a81d44c84bf1e0192dd3af3ad0d
Author: Al Bailey <email address hidden>
Date: Mon Dec 16 08:48:14 2019 -0600

    Fix zuul tox flake8 failures from newer version of hacking

    A newer version of hacking was released which enables additional
    checks and is breaking flake8 and zuul.

    Hacking has now been clamped at 2.0.0 in test-requirements.txt
    Added the same for patch-alarm, although it was not failing.

    The new checks that are fixed are:
     H106: Don't put vim configuration in source files
     W605 invalid escape sequence
     F632 use ==/!= to compare str, bytes, and int literals
     F841 local variable is assigned to but never used

    The following flake8 extension check has been removed:
     H904 Delay string interpolations at logging calls

    Partial-Bug: 1856585
    Change-Id: I8bdc94539f4a6ce243c4e30efc07eed3bad1ce62
    Signed-off-by: Al Bailey <email address hidden>
    (cherry picked from commit 5d2da5d041028afa916149da660809ca6fc4fb73)