Rewrite redirection and ACAO tests
Rewrite redirection and ACAO tests

- ACAO test now parses the XML files to see if they're setting the
domain to '*' or if it's a lot more locked down than that
- crossorigin.xml -> crossdomain.xml
- Rewrite redirection test from scratch to have a lot more clarity

mozilla/http-observatory,mozilla/http-observatory,mozilla/http-observatory,april/http-observatory,april/http-observatory,april/http-observatory