Issue title: Add support for AWS Elastic Map Reduce (EMR)
 Issue body: *Title*: *Add support for AWS Elastic Map Reduce*

*Description*:
> Describe your idea.  Please be detailed.  If a feature request, please
describe the desired behavior, what scenario it enables, and how it
would be used.

We need support for AWS Elastic Map Reduce clusters and instances.

[optional *Relevant Links*:]
> Any extra documentation required to understand the issue.
- https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/emr.html
- https://docs.aws.amazon.com/emr/latest/APIReference/API_ListClusters.html
-  https://docs.aws.amazon.com/emr/latest/APIReference/API_ListInstances.html

 Comments: 
 Comment 0: This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs.

 Comment 1: This issue has been automatically closed for inactivity. If you still wish to make these changes, please open a new change or reopen this one.

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