stx-tools: Dockerfile build fails (pyparsing)

[Davlet Panech]

Brief Description
-----------------
Dockerfile in starlingx/tools fails to build due to compile errors in python package "pyparsing".

This likely affects all branches.

Severity
--------
Critical

Steps to Reproduce
------------------
Clear docker cache and to build starlingx/tools Docker file

Expected Behavior
------------------
Build works

Actual Behavior
----------------
Build fails

Reproducibility
---------------
Reproducible

System Configuration
--------------------
N/A

Branch/Pull Time/Commit
-----------------------
master/2021-10-24

Last Pass
---------
master/2021-10-22

Timestamp/Logs
--------------
00:36:29 Step 28/52 : RUN pip install -c /home/$MYUNAME/builder-constraints.txt pbr==5.6.0 --upgrade && pip install -c /home/$MYUNAME/builder-constraints.txt git-review==2.1.0 --upgrade && pip install -c /home/$MYUNAME/builder-constraints.txt python-subunit==1.4.0 junitxml==0.7 testtools==2.4.0 --upgrade && pip install -c /home/$MYUNAME/builder-constraints.txt tox==3.23.0 --upgrade
[...]
00:36:45 Collecting pyparsing>=2.0.2 (from packaging>=14->tox==3.23.0)
00:36:45 Downloading https://files.pythonhosted.org/packages/31/c9/b29ea153b9bffaae787ecc81873b4b51bd36cc13c37586b41891beae37eb/pyparsing-3.0.1.tar.gz (876kB)
00:36:46 Complete output from command python setup.py egg_info:
00:36:46 Traceback (most recent call last):
00:36:46 File "<string>", line 1, in <module>
00:36:46 File "/tmp/pip-build-Pmo8SM/pyparsing/setup.py", line 8, in <module>
00:36:46 from pyparsing import __version__ as pyparsing_version
00:36:46 File "pyparsing/__init__.py", line 112, in <module>
00:36:46 from .util import *
00:36:46 File "pyparsing/util.py", line 16
00:36:46 _all_names: List[str] = []
00:36:46 ^
00:36:46 SyntaxError: invalid syntax
00:36:46

Test Activity
-------------
N/A

Workaround
----------
None

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/c/starlingx/tools/+/815346

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/c/starlingx/tools/+/815346
Committed: https://opendev.org/starlingx/tools/commit/4b13662f54ad81ff9433b68708a5914165c9c5c6
Submitter: "Zuul (22348)"
Branch: master

commit 4b13662f54ad81ff9433b68708a5914165c9c5c6
Author: Davlet Panech <email address hidden>
Date: Mon Oct 25 11:32:15 2021 -0400

    Use pyparsing===2.4.7

    This is the last version that works with python 2.7

    Closes-Bug: 1948697
    Signed-off-by: Davlet Panech <email address hidden>
    Change-Id: Ib9660c1d43f261c091ae1cbf2ccf66f2c7073ce8