New DNSConfig management module

There is a new vaultcontainer management module placed in the plugins folder:

plugins/modules/ipadnsconfig.py

The dnsconfig module allows to modify global DNS configuration.

Here is the documentation for the module:

README-dnsconfig.md

New example playbooks have been added:

playbooks/dnsconfig/set_configuration.yml
playbooks/dnsconfig/disable-global-forwarders.yml
playbooks/dnsconfig/disallow-reverse-sync.yml

New tests for the module:

tests/dnsconfig/test_dnsconfig.yml

playbooks/dnsconfig/disable-global-forwarders.yml

@@ -0,0 +1,9 @@
+---
+- name: Playbook to disable global DNS forwarders
+  hosts: ipaserver
+  become: true
+
+  tasks:
+  - name: Disable global forwarders.
+    ipadnsconfig:
+      forward_policy: none