Add test for Sitemap module enabled plugins

Added a functional test to verify sitemap module plugins are enabled by default.

Looks good to me. Over to Adam for final review. Marking as RTBC.

I think this test is worthwhile to have but I'm not sure it's testing the most useful aspects of this.

For example, we don't need to check that the specific plugin checkboxes are checked, we just need to be sure that /sitemap has what we expect it to. Ideally we would not rely on CSS selectors at all, since they can change out from under us.

Self-assigning to see if I can optimize this a bit.

Made a few changes:

• Everything now happens in checkSitemap(), so that the test happens for authenticated and anonymous users
• I don't bother testing the admin side, as it's beside the point. We care that the sitemap looks a certain way, not that configuration flags are correct

Merged into 1.x and cherry-picked to 1.0.x, as this is a test-only change. Thanks!

Automatically closed - issue fixed for 2 weeks with no activity.