dependencies: small package changes, added license for testpath.

dependencies: dropped amqplib as celery doesn't need it anymore.

celery: celery 4.X support. Fixes #4169 - update tasks - enabled celerybeat to function - check and cleanup code for 4.X

pylons: fixed code and test suite after removal of pylons.

paster: commands cleanup. - moved upgrade_db into paster_commands (soon to be deprecated)

pylons: deprecate certain pylons paster command

compat: use py3 compatible configparser in all places.

tests: pass in config ini into global configuration, same as the real app does.

translation: fix wrong argument call on request

pylons: remove core components out of setup.py