Change functional test parameters, update to jQuery3

[mistergone]

This code will update the functional tests to use a school from the default data (collegedata.json) rather than the test data (test_program.json) to avoid extra steps in making those functional tests work.

It also updates jQuery in the application from 1.11.3 to 3.3.1.

Changes

• Upgrade jquery to version 3+, fixing old vulnerabilities
• Change functional tests to use data from the 'collegedata' fixture, which is loaded automatically in standalone_setup.sh, rather than the 'test_program' fixture, which must be loaded manually

Testing

• Run functional tests as outlined in the README.

Review

• @chosak
• @schbetsy

Notes

• Some functional tests are going to be changed in a future PR

Todos

• One pending spec and a few other specs which test the opening of external sites will be changed to test only that links are properly inserted into the text.

Checklist

• [ ] Changes are limited to a single goal (no scope creep)
• [ ] Code can be automatically merged (no conflicts)
• [ ] Code follows the standards laid out in the front end playbook
• [ ] Passes all existing automated tests
• [ ] New functions include new tests
• [ ] New functions are documented (with a description, list of inputs, and expected output)
• [ ] Placeholder code is flagged
• [ ] Visually tested in supported browsers and devices
• [ ] Project documentation has been updated (including the "Unreleased" section of the CHANGELOG)

[coveralls]

Coverage remained the same at 100.0% when pulling c391925dd3964c66ecf114a8e40fcbd9e72cfddc on no-really-the-functional-tests-are-fixed-now-seriously into 8826655141c65e58fdcd4d20048d5c1d99299747 on master.

[schbetsy]

This is passing for me, when I remove the fit*! And it looks to be more stable than the previous version (I've done a few trial runs and haven't seen any intermittent failures so far).

(* There's still one failure, where it tries to open an 3rd party site and times out. As we discussed, we're adding a backlog task to keep the functional tests from doing that, so I'm not worried about it here.)