When using Python3, the exec_module function errors out with a
unsupported operand type(s) for +: 'dict_keys' and 'list'
error when adding the .keys() to a static list. Use the explicit
list function to make a list of keys and then add to the ['tags'] list.
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
- removed actions feature as this should be global and not per module
- removed default fields from return docs
- moved tags docs to shared fragments
- removed unused imports
