testing/shunit2: Remove (incorrect) shell globing
The test framework of shunit2 needs to have the TMPDIR variable set correctly. As we want to ensure we scope the temporary directory properly, lets create our own temporary path using mktemp and pass this to shunit2. We can now cleanly remove whatever is in this path.
Signed-off-by: Olliver Schinagl oliver@schinagl.nl