Fixes: ``` $ tmt run discover /var/tmp/tmt/run-035 Found 1 plan. /plans/tier1-internal discover how: fmf url: https://gitlab.com/redhat/rhel/tests/dracut.git fail: Command 'git clone https://gitlab.com/redhat/rhel/tests/dracut.git /var/tmp/tmt/run-035/plans/tier1-internal/discover/default-0/tests' returned 128. ```
Also, drop the STI test inherited from Fedora since it: 1) doesn't work 2) messes up gating, since the STI tests take precedence over TMT ones