Different backends may communicate with each other

[sinpat]

As a user/customer I would like the different devices to communicate with each other

60 SP

Tasks:

• define master node
• define slave node
• Set up MQTT in core MQTT integration #305
• Set up messaging adapter
• Splitt core project Splitt core project #364

[Legion2]

to separate master and slave the current core must be splitted. So the real core can be deployed on master and slave, without the parts that should only be on the master.