Resolve flaky GitlabCeRelease spec
When another spec cloned a fixture repository into the location this
spec uses, and then didn't clean up after itself, it would pollute the
security_remote
spec by not changing the master
branch to
security/master
.
Now we explicitly clean up any leftover fixture repositories before we start with a clean environment for the release spec.
Closes https://gitlab.com/gitlab-org/release-tools/issues/322