Added JUnit Launcher test (failing)

Added test to verify JUnit launcher itself is correctly compiling and
executing unit tests. This is currently failing with an unexpected
result.
Fixed JUnit launcher test

The JUnit launcher test which is responsible for correctly executing
unit tests was failing. The reason for that is the imported project
was not compiled. This commits fixes this issue by running the builder
on the imported project and then launching the JUnit test.
Added patron.

See here for more information:

http://www.patreon.com/user?u=254085