* Added modules to create, delete, and describe EC2 Placement Groups.
* Remove unnecessary print statement
* Update to use boto3.
* De-linting
* Remove facts from this PR
* Update to newer method of handling Boto3 connections and exceptions.
* Futzing around with imports and HAS_BOTO3
* Fix up exception imports.
* Remove redundant default.
* Handle DryRunOperation errors appropriately.
* Remove redundant BOTO3 check.
* Use shorter licence declaration.
* Remove redundant HAS_BOTO3 import.
* Add AWSRetry decorators to API calls.
* Add new 'strategy' parameter to allow for cluster and spread PGs.
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