* 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
As discussed in full at https://github.com/datacenter/aci-ansible
we desired a better naming convention for ACI modules before they ship
with Ansible v2.4
The result is summarized in this PR.
The modules now also include the classes from the object model, as well
as a link to the documentation.
