Remove non-simcore services from simcore-stack

[mrnicegyu11]

Remove non-simcore services from simcore-stack and associated docker-compose.yml files.

This will ring a better code design. This popped up in this context: #441 Here we have to hardcode special excuses for services that are in the simcore-stack but actually are not simcore services, such as traefik, rabbit, postgres, etc.

The following should be refactored into other files and/or docker swarm stacks:

• postgres
• rabbit
• redis

[mrnicegyu11]

Tracks #243