This also removes the outdated comments around authorship of each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.
This fixes issues with calling 'python module_build_service/manage.py' directly
from the MBS git repo as part of testing local module builds without installing
MBS.
The issue is that 'import pkg_resources' for some reason tries to load
module_build_service.backports before the module_build_service.app actually
exists. This results in traceback saying that module_build_service.app does
not exist.
This commit fixes this by importing whole module_build_service in backports.py.
