It's not necessary to store the tests in a separate repository, since
other packages can just reference the tests in this repo.
Also update, the other tests to pull from git repos in the rpms namespace.
We need to uninstall clang at the beginning of this test along with libomp,
so that we can later install clang to test that it has the correct dependency on
libomp. If we don't uninstall clang along with libomp at the beginning, then
clang won't be installed later and libomp won't get pulled back in.