* Deprecate Entity, EntityCollection and use subspec in network modules
* As per proposal https://github.com/ansible/proposals/issues/76
deprecate use of Entity, EntityCollection, ComplexDict, ComplexList
and use subspec instead.
* Refactor ios modules
* Refactor eos modules
* Refactor vyos modules
* Refactor nxos modules
* Refactor iosxr modules
* Add support for key in suboptions handling
* Fix CI issues
* 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