When we test our code coverage compilation, it breaks the code coverage
report for the current rspec process. By running that code separately,
we gain a correct coverage report for the rest of the code again.
So unfortunately, we can't report on the code coverage of this
particular task and have to ignore it. But at least CI depends on the
correct function of this task and would fail if it didn't work.
Apparently, Rake's way of reloading the task code confuses the code
coverage report. Code tested by rake task specs was not recognised as
covered even though it was.
