Comment 5 for bug 1927137

Reviewed: https://review.opendev.org/c/starlingx/tools/+/789620
Committed: https://opendev.org/starlingx/tools/commit/f7f2eb3959b7d81a639d75106697acd9c0573adb
Submitter: "Zuul (22348)"
Branch: r/stx.5.0

commit f7f2eb3959b7d81a639d75106697acd9c0573adb
Author: Scott Little <email address hidden>
Date: Tue May 4 12:42:36 2021 -0400

    fix git-review within docker build environment

    'tb create' fails to create a build environment since
    upstream git-review was updated of Apr 26.

    Fix is to install/update pbr ahead of git-review.

    Also, to reduce the likelyhood of this recurring, lock
    down specific versions of the pypi supplied tools we
    know to work.

    Closes-bug: 1927137
    Signed-off-by: Scott Little <email address hidden>
    (cherry picked from commit ac05493480f6df6f31d071d29380c1b4f35b70a9)
    Change-Id: I5842913d34c87a962839fb29f13c05a259006440