Require the agency setting

I ended up doing a lot more than just requiring the agency setting for JS attachment. There was a lot of potential for clean-up in usfedgov_google_analytics_page_attachments(). Notably, I changed the check for page URLs starting with /user/ to checking the specific user.login, user.logout, and user.pass routes. I checked the original bug report for which this code was added, 🐛 Appropriate Placement of the DAP Script Tag Fixed . This change is in accordance with that original issue report, which specified the JS should not be attached on the user login, logout, and password reset pages.

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