Create unit test which fails when rewiring the meta-meta build.
Fix test case for expected output
Replaced the integration test concerning settings injection

The new test executes a full extraction and building cycle,
in order to verify that any settings injected in sbt levels
beyond those present in the source tree of the project.
Re-add the temp-distributed-build-snapshots repository

That is necessary as the "cunei" fork of jacks is only
available there at this time.