Wrap ansible command in OS detection script

[azarouski]

Let's add a script that will automatically detect server OS and select appropriate yaml file for ansible.

[azarouski]

To check this issue you need to try to run ansible on inappropriate systems e.g.

on linux server run:

ansible-playbook -vvv -i hosts mac-devices.yml

on mac server run:

ansible-playbook -vvv -i hosts devices.yml

---

The ansible script is supposed to exit with an error and not make any changes to the system.
OS version is not compatible!

[dhreben]

Verified.

Linux:

ansible-playbook -vvv -i hosts mac-devices.yml

fatal: [localhost]: FAILED! => {
    "assertion": "os.stdout is search(\"Darwin\")",
    "changed": false,
    "evaluated_to": false,
    "msg": "OS version is not compatible!"

Mac:

ansible-playbook -vvv -i hosts devices.yml

fatal: [localhost]: FAILED! => {
    "assertion": "os.stdout is search(\"Linux\")",
    "changed": false,
    "evaluated_to": false,
    "msg": "OS version is not compatible!"