Cleanup and fix unit tests when run as part of cfgov-refresh

[chosak]

This PR fixes Python unit tests so that they can be run in the context of the cfgov-refresh project. It also removes spurious logging during unit tests.

Additions

• Added required test data file paying_for_college/data_sources/ipeds/test.txt.zip to setup package.

Changes

• Python unit tests mock print and sys.stdout when necessary to remove spurious output.
• Fix use of fixture when running tests as part of cfgov-refresh.
• Skip standalone view tests when run as part of cfgov-refresh.

Testing

• Run ./pytest.sh from the college-costs root to verify that tests run in standalone mode.

  Output should look something like:

  
  .................................................................................................................
  ----------------------------------------------------------------------
  Ran 113 tests in 7.039s

OK

- From the cfgov-refresh root, run these commands to install this PR branch and invoke the unit tests:

$ pip install git+https://github.com/cfpb/college-costs.git@fix-tests#egg=college-costs $ cd cfgov $ DJANGO_SETTINGS_MODULE=cfgov.settings.test python manage.py test paying_for_college

 Output should look something like:

..............................................................................................s..................

Ran 113 tests in 7.141s

OK (skipped=1)

 Note that one of the tests is skipped if not run in standalone mode.

## Review

- @higs4281 @rosskarchner @Scotchester 

## Checklist

* [X] Changes are limited to a single goal (no scope creep)
* [X] Code can be automatically merged (no conflicts)
* [ ] Code follows the standards laid out in the [front end playbook](https://github.com/cfpb/front-end)
* [X] 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
* [X] Project documentation has been updated (including the "Unreleased" section of the CHANGELOG)

[coveralls]

Coverage decreased (-0.08%) to 99.919% when pulling c3b28934ae30d8cef4b2e626a7ca5f3a08b90b95 on fix-tests into 7c546ad9415f1270694d84460d48abee78d3dbf7 on master.

[coveralls]

Coverage remained the same at 100.0% when pulling 3c21b816fbb4c0e36577d85eb9041f2967b6f5ed on fix-tests into 7c546ad9415f1270694d84460d48abee78d3dbf7 on master.