The tests were using an incorrect value for the site setting (the name of the group instead of the id).
`no_ads_for_groups` shows groups names in the UI byt actually stores IDs.
* DEV: Stop loading external scripts while running tests
* Revert "Turn of CSP for tests"
This reverts commit db1bf99277. It had no effect, since CSP is set by the server, and this was only affecting the client
A new setting has been added in Admin > Settings > Ad Plugin called
"no ads for groups". Add group names to this list. If a user belongs
to any of the groups, they will not see any ads. This is an alternative
to using trust level settings like "adsense through trust level".