Update CI and cloud.gov config to build with CircleCI

[LindsayYoung]

This changeset removes the old Travis CI config in favor of the new CircleCI config.

It also removes the .python-version file from the repository for the time being. We were never able to move forward on the pip-tools install, so this is not needed at the moment and makes dealing with Python updates locally a bit more cumbersome at the moment. We can bring this back once we have a chance to work on Python dependency management a bit more and provide clear documentation on how to manage these things.

In the interim, if you are using pyenv to manage your local Python installations, please be sure you have a global version set, e.g., pyenv global 3.5.4.

[codecov-io]

Codecov Report

Merging #1253 into develop will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop    #1253   +/-   ##
========================================
  Coverage    79.55%   79.55%           
========================================
  Files           46       46           
  Lines         3287     3287           
  Branches       495      495           
========================================
  Hits          2615     2615           
  Misses         672      672

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[ccostino]

@xtine should this kick back up one directory before running the tests with npm?

[xtine]

npm tasks still run without being in the root directory.

[ccostino]

We're currently running into an issue where the locales available in the Python Docker image (and this is an issue in both the official Python Docker image as well as the CircleCI version) don't support currency formatting, which is used in one of our tests:

======================================================================
ERROR: test_currency_filter_not_none (data.tests.test_utils.TestUtils)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/circleci/repo/fec/data/tests/test_utils.py", line 15, in test_currency_filter_not_none
    assert filters.currency(1.05) == '$1.05'
  File "/home/circleci/repo/fec/data/templatetags/filters.py", line 21, in currency
    return locale.currency(num, grouping=grouping)
  File "/usr/local/lib/python3.5/locale.py", line 262, in currency
    raise ValueError("Currency formatting is not possible using "
ValueError: Currency formatting is not possible using the 'C' locale.

----------------------------------------------------------------------

We're trying to figure out ways to solve this because unfortunately we cannot just switch locales to one that will work. The only available ones are C, C.UTF-8, and POSIX, which don't support currency formatting.

[ccostino]

I've commented out the failing test for now, I think it's safe to just get this working and then... circle back on fixing that (sorry!).

Now I'm stuck on a Django SECRET_KEY setting issue, but this is in the deployment step at this point at least!

[ccostino]

Thank you @LindsayYoung for the help with that!

[ccostino]

Hmm, guess we should close this one in favor of PR #1270?