* Ansible 2.3 feature support for dellos6.
- With the new Ansible 2.3 infra changes, the dellos modules doesn't work
(the new infra changes are not backward compatible), so added the below
changes support it.
- Added the new terminal plugin for DellOS6
- Added the new action plugin for DellOS6
- Modified the modules to work with the new infra.
- with that it adds support for DellOS6 Persistent Connection support.
* Remove pep8 confirming files from dellos6.py and dellos6_config legacy-files
* Ansible 2.3 feature support for dellos9 and dellos10
* Use Persistent Connection Manager
* Fix CI issue, revert the doc and metadata changes
* Reverted the meta_info (supported_by) to community from core
* Fixed the CI issues, use module_utisl.six and updated legacy-files
Senthil Kumar Ganesan