Comment 1 for bug 1213893

For more than whitelist I don't have a strong opinion, but a possible solution would be:

1) Run whitelists in alphabetical order
2) For each whitelist, use the classic ordering
3) If a test has been already added by a previous whitelist, don't add it again when generating the list of tests.

Again, I am flexible about several whitelists, as it is a new use case