* CNOS Vlag module is refactored to use persistence connection instead of paramiko.
* Changing interface and port channel modules to persistent connection and adding UT for them.
* Fixing pep8 issues
* Removing trailing new line
* Removing trailing new line
* Removing trailing new line
* Correcting indentation mistake
* Update cnos_vlag.py
* Removing commented examples
They are commented because those configurations are not meant for L2 ports
* 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