Changes to the metadata format were approved here:
https://github.com/ansible/proposals/issues/54
* Update documentation to the new metadata format
* Changes to metadata-tool to account for new metadata
* Add GPL license header
* Add upgrade subcommand to upgrade metadata version
* Change default metadata to the new format
* Fix exclusion of non-modules from the metadata report
* Fix ansible-doc for new module metadata
* Exclude metadata version from ansible-doc output
* Fix website docs generation for the new metadata
* Update metadata schema in valiate-modules test
* Update the metadata in all modules to the new version
New module by @tedder for handling granting/revoking access to KMS secrets.
For example:
```
- name: grant user-style access to production secrets
kms:
args:
mode: grant
key_alias: "alias/my_production_secrets"
role_name: "prod-appServerRole-1R5AQG2BSEL6L"
grant_types: "role,role grant"
```