Elasticsearch updates, CORS changes, and minor bug fixes

What's Changed

In this release we've completly upgraded our Elasticsearch mappings to support versions 5.x and above. There were a few types that were not updated from our last release.

We've also improved our build process to avoid random failures during our integration tests and added a ALLOWED_DOMAINS configuration variable to force our users to go through our API URL api.code.gov.

Change Details

• Added ALLOWED_DOMAINS configuration.
• Updated our Elasticsearch types in our mappings.
• Obsolete mappings were removed.
• Elasticsearch settings were updated.
• Elasticsearch mappings fields are now configured to text data type with a keyword field for sorting and aggregations.
• Updated Elasticsearch docker image used in our integration tests (.circleci/config.yml).
• Added a sleep time of 45 seconds to our integration test to ensure that the Elasticsearch container is up and running.
• Minor bug fixes to indexing process and tests.

PRs Included in this release

• #267
• #266
• #265
• #264
• #263