Test Comments.
Test Rules.
Test Gitolite.NbGroups(), fix addxxxGroup().
Test NbGroupRepos() and NbGroupUsers().
Removes gitolite.Groups().
Test rule.addUser().
Test rule.GetUsers().
Test Gitolite.GetGroup().
Test comment.String().
fix and Test grp.addUser().
Test kind.String().
Test repo.String().
Test adding same group twice to a rule.
Test addRepoFromName(), which means Group is a repoContainer.