Check that all po/pot files are valid

Perform minimal checks on po and pot files so that no broken files can
get imported.

Add msgfmt to list of requirements in doc/source/setup.rst.

Change-Id: Ifa9fe2fc1ca9a41621ff3039c249700cdb1cd0ac
Related-Bug: #1299349
Co-Authored-By: Clark Boylan <clark.boylan@gmail.com>
Fixed some typos throughout the codebase

Change-Id: I66e421b1743f7b3e3e7ecd34e64f67b6e0a53f2c
Remove the configure portion of extension docs

The docs themselves have little to do with configuration,
and mostly describe how to enable the extension.
Suggest removing the configuration part of the file rename.
Also motivating this change, is the fact that we are including
a doc that helps to configure the federation extension
(https://review.openstack.org/#/c/89220/).

Change-Id: I0fe845ac9bdfede330a7eb56fee6f971290789b3
Merge "Check that all po/pot files are valid"
Merge "Remove the configure portion of extension docs"
Merge "Fixed some typos throughout the codebase"