Turn off URLs for landing page and auxiliary pages

[higs4281]

This stops our incomplete pages from showing up on cfgov, but still allows them to render in standalone mode for development.

Caveat: There are legacy assets that were stashed in /paying_for_college/local_static/paying_for_college so that the site wouldn't fall over when we first stood up standalone. Those assets are not available in the server environments -- only standalone sees them -- so they should be tossed or moved into our front-end build when the time comes for auxiliary-page development.

Testing

The server part of this will have to be tested on build.
for standalone, you shouldn't see any differences.

Review

• @amymok @marteki @mistergone
• [x] Project documentation has been updated (including the "Unreleased" section of the CHANGELOG)

[coveralls]

Coverage remained the same at 100.0% when pulling a32e0cf209a9377127b52c275f22bad14d10057f on urls-off into 503ad3882338e8f1120b9fa2b3aa88b4d3b165fe on master.

[marteki]

The "Understanding your financial aid offer" tool is still appearing and functioning properly. The other suite pages are not, but that's to be expected right now on standalone.

👍

[amymok]

👍

[coveralls]

Coverage remained the same at 100.0% when pulling b9f0ae19af0b968bd9944ee75286b424835729c8 on urls-off into e5441b2bc8a36edb01791a1142f4be663400f06e on master.