- remove some unnecessary gradle dependencies

Fixed error to not handle YAML correctly.

Resolve "PoC: Use mustache as template engine"

Closes #19

See merge request jastadd/ros2rag!2

- added fail-fast behaviour to mustache (if a name/method can not be resolved)
- enabled logging of mustache (using log4j)

- also make definitions less verbose again
- resolves #28

- see #26

- Added TestUtils.waitForMqtt

- all tests have fail-fast-behaviour if mqtt broker is not connected
- added some documentation on how to create new test cases
- Base: Fixed logging of writes to output actual values of terminal and topic

- Starter: Send initial DataConfig
- Starter: Always send complete RobotConfig