Add admin login scenario (still pending).
Make salt minion settings available to tests.
Make admin login feature pass.

Note: this assumes that Koha is properly installed. The tests
will fail if the intranet page still displays the web installer.
Include screenshot in html report when scenario fails.
Merge branch 'admin-login'

The tests will fail if Koha is not fully installed, because
the intranet pages will display a 'web installer', obstructing
the normal login process.