Comment 4 for bug 1801761

Reviewed: https://review.openstack.org/615610
Committed: https://git.openstack.org/cgit/openstack/oslo.upgradecheck/commit/?id=c4283dd0ebbb2e64947b966e51b7f3f47233b7be
Submitter: Zuul
Branch: master

commit c4283dd0ebbb2e64947b966e51b7f3f47233b7be
Author: Ben Nemec <email address hidden>
Date: Mon Nov 5 17:09:58 2018 +0000

    Force translation of table header

    Concatenation of lazily translated strings using + is not supported,
    but prettytable is doing that internally with one of the translated
    strings that we pass in. Use six.text_type to force immediate
    translation of the string before passing it to prettytable.

    Change-Id: I73929f9df85a9856bb70b37ee08f5399f98fdb00
    Closes-Bug: 1801761