Create test layout for control repositories

[bittner]

I want to make sure our control repository is covered by tests.

Currently, I need to figure out myself how to create a test setup. An example suggested by @alvagante in issue #289 is example42/psick.

It would be good if there was a PDK command to create such a test setup, and a command to run the test suite (and validation) of the control repository.

[bittner]

This works by creating a pseudo-module and taking over some relevant files, as described by @TJM in #289 (comment) for control-repo validation. The Rakefile is relevant for running unit tests, in addition.

[bittner]

Closing this issue in favor of #333.