[GitHub] morgendave opened a new pull request #4101: [AIRFLOW-3272] Add base grpc hook

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morgendave opened a new pull request #4101: [AIRFLOW-3272] Add base grpc hook
URL: https://github.com/apache/airflow/pull/4101
 
 
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   Jira
     My PR addresses the following Airflow Jira issues and references them in the PR title. For example, "[AIRFLOW-3272] My Airflow PR"
   https://issues.apache.org/jira/browse/AIRFLOW-3272
   Description
     Add support for gRPC connection in airflow. 
   
   In Airflow there are use cases of calling gPRC services, so instead of each time create the channel in a PythonOperator, there should be a basic GrpcHook to take care of it. The hook needs to take care of the authentication.
   
   Tests
     My PR adds the following unit tests OR does not need testing for this extremely good reason:
   Commits
     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":
   Subject is separated from body by a blank line
   Subject is limited to 50 characters (not including Jira issue reference)
   Subject does not end with a period
   Subject uses the imperative mood ("add", not "adding")
   Body wraps at 72 characters
   Body explains "what" and "why", not "how"
   Documentation
     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.
   Code Quality
     Passes flake8

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