curl Take Two

Unfortunately the curl issue from #923 returns and this will solve it for good.

Features:

• none

Changes:

• Downgrade curl to 7.61.1 9f6a130

Bugfixes:

• none

Improvements:

• create a rabbitmq-headless service for RabbitMQ discovery so that we still have a regular rabbitmq with a service IP

Documentation:

• none