Simple test-suite for wanna-build

This file runs wanna-build in a clean environment to make sure, certain
features work as expected.

At the moment it
 * Uploads a source
 * Take the build
 * Marks it as uploaded
 * Uploads a source with build-depends
 - Makes sure the package is marked Dep-Wait
 * Uploads a new version of the dependency
 - Makes sure the Dep-Wait is cleared