[GitHub] drewsonne opened a new pull request #4477: [AIRFLOW-3670] Add stages to Travis build

[GitBox <gi...@apache.org>]

drewsonne opened a new pull request #4477: [AIRFLOW-3670] Add stages to Travis build
URL: https://github.com/apache/airflow/pull/4477
 
 
   Allow travis to fail the entire build quickly, if the flake8 build fails
   
   ### Jira
   
   - [x] My PR addresses the following [Airflow Jira](https://issues.apache.org/jira/browse/AIRFLOW/) issues and references them in the PR title. 
     - https://issues.apache.org/jira/browse/AIRFLOW-3670
   
   ### Description
   
   - [x] Here are some details about my PR, including screenshots of any UI changes:
    This makes no changes to the application code, and is designed to improve the development ccle by reducing the cycle time from test start to notification that test has failed
   
   ### Tests
   
   - [x] My PR adds the following unit tests __OR__ does not need testing for this extremely good reason:
   No tests as this is a config for the test running. An example of the fast fail can be seen here https://travis-ci.org/drewsonne/airflow/builds/478054124
   
   ### Commits
   
   - [x] My commits all reference Jira issues in their subject lines, and I have squashed multiple commits if they address the same issue. In addition, my commits follow the guidelines from "[How to write a good git commit message](http://chris.beams.io/posts/git-commit/)":
     1. Subject is separated from body by a blank line
     1. Subject is limited to 50 characters (not including Jira issue reference)
     1. Subject does not end with a period
     1. Subject uses the imperative mood ("add", not "adding")
     1. Body wraps at 72 characters
     1. Body explains "what" and "why", not "how"
   
   ### Documentation
   
   - [x] In case of new functionality, my PR adds documentation that describes how to use it.
     - When adding new operators/hooks/sensors, the autoclass documentation generation needs to be added.
     - All the public functions and the classes in the PR contain docstrings that explain what it does
   
   ### Code Quality
   
   - [x] Passes `flake8`
   

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