* Add common and Swagger client utils for FTD modules
* Update FTD HTTP API plugin and add unit tests for it
* Add configuration layer handling object idempotency
* Add ftd_configuration module with unit tests
* Add ftd_file_download and ftd_file_upload modules with unit tests
* Validate operation data and parameters
* Fix ansible-doc, boilerplate and import errors
* Fix pip8 sanity errors
* Update object comparison to work recursively
* Add copyright
