* Add support for EC2 dynamic data in ec2_facts
- Flattens out JSON in the instance identity document and IAM info/credentials for easy access to facts
- This changes region fact from ‘ansible_ec2_placement_region’ to ’ansible_ec2_instance_identity_document_region’
* Maintain backwards compatibility by putting the region into the old key
* Improve JSON parsing logic and split security group IDs
* Add documentation, backwards compatibility, fix bug and formatting
- Update documentation for ec2_facts with return values
- Preserve JSON value from the metadata service for backwards compatibility
- Fix bug in fix_invalid_varnames
- The keys in the dict were being modified in place; new dict now created to hold the sanitized keys
- Consolidate two replace calls with a regex substitution
- Move imports for ec2_facts to the top
* Add support for parsing the IAM instance profile role
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