Comment 10 for bug 1959600

Reviewed: https://review.opendev.org/c/openstack/devstack/+/827421
Committed: https://opendev.org/openstack/devstack/commit/05a2cebeb4e93377fa88633eef4b2cc0ea584450
Submitter: "Zuul (22348)"
Branch: stable/train

commit 05a2cebeb4e93377fa88633eef4b2cc0ea584450
Author: Rodolfo Alonso Hernandez <email address hidden>
Date: Sat Jan 29 11:29:07 2022 +0000

    Add python3.6 pip support

    Since pip v22, python3.6 is not supported (the minimum version is
    python3.7). This patch adds the reference for the pip3.6 URL to be
    used instead of the default one.

    NOTE: stable/train had its own method to provide support for py3x.
    This patch uses it instead of pushing the master patch approach.

    This patch is also fixing the py35 pip URL string that should be
    https://bootstrap.pypa.io/pip/3.5/get-pip.py.

    Conflicts:
      tools/install_pip.sh

    Closes-Bug: #1959600
    Change-Id: Iab2c391d5388461fe9e9037cee81884ce8032e72