This merges the configuration from conf/config.py to
module_build_service/config.py. This also greatly simplifies the logic
in `init_config`. Additionally, `init_config` is no longer aware of
Flask. This will allow us to eventually break up the configuration
between the API and the backend.
This also removes the outdated comments around authorship of each
file. If there is still interest in this information, one can just
look at the git history.
