* Refactor common network shared and platform specific code into package (part-1)
As per proposal #76 refactor common network shared and platform specific
code into sub-package.
https://github.com/ansible/proposals/issues/76
* ansible.module_utils.network.common - command shared functions
* ansible.module_utils.network.{{ platform }} - where platform is platform specific shared functions
* Fix review comments
* Fix review comments
* Use double-quotes for expect integration tests
* Cast user input to string for expect integration tests
* Remove usage of cmp() for python3 compatibility
- Add code smell test to look for cmp usage
- Fixes#24756