Fix test failure caused by making genconfig trackerless When I removed the need to have a tracker for genconfig, I broke a couple of tests. The breakage was hidden by a bad workflow. This change allows the tests to pass and refactors reporting of UsageError exceptions in admin.py. It also adds a test for failure in install command as there is a test case for it and this test tests the refactor.

Babel
Jinja2
MarkupSafe
Pygments
alabaster
certifi
charset-normalizer
docutils
idna
imagesize
packaging
pyparsing
requests
six
snowballstemmer
sphinxcontrib-serializinghtml
sphinxcontrib-websupport
urllib3