Summary

This improves the dev experience and is based on @e2's work in #353.

Details

• Run and build aruba in isolated environment via docker (credit @e2 in Use Docker for isolated testing #353)
• Run container with docker-compose without making docker-compose a required dependency. Rake tasks read in the docker-compose.yml instead
• Document developer rake tasks via cucumber features
• Add more hints to CONTRIBUTING.md
• Add TESTING.md (WIP) (credit @e2)
• Cleanup rake tasks via separate namespaces
• Some more minor fixes
• Don't run feature test if executable required for test is not installed (python, bash, zsh, javac, ...)

Motivation and Context

• Issue Feature request: docker support #378 (FR: docker support)
• Issue Add documentation about how to use the docker rake tasks #364 (Add documentation for developer tasks)
• Issue Remove test dependencies on python, JDK and zsh #362 (Remove test dependencies)

How Has This Been Tested?

• Covered by existing tests
• Covered by newly added tests

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.