exploy opened a new pull request #4038: [AIRFLOW-1970] Let empty Fernet key or special `no encryption` phrase. URL: https://github.com/apache/incubator-airflow/pull/4038 ### Jira My PR addresses the following [Airflow Jira](https://issues.apache.org/jira/browse/AIRFLOW-1970) issues and references them in the PR title. ### Description Once the user has installed Fernet package then the application enforces setting valid Fernet key. This change will alter this behavior into letting empty Fernet key or special `no encryption` phrase and interpreting those two cases as no encryption desirable. ### Tests My PR adds no tests as of now. ### 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/)": ### Code Quality - [ ] Passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
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