tests: include a playbook to install net-tools for socket checks

This playbook could be used in the future to install anything else we
need on these nodes for testing purposes.

Signed-off-by: Andrew Schoen <aschoen@redhat.com>

tests/functional/setup.yml

@@ -0,0 +1,11 @@
+---
+
+- hosts: all
+  gather_facts: true
+  become: yes
+  tasks:
+
+   - name: install net-tools
+     package:
+       name: net-tools
+       state: present