Use yml extension for pytest tests

The pytest .yaml files have been rename to .yml to enable
build-galaxy-release to fix the prefix of the ansible-freeipa modules.

tests/pytests/dnszone/playbooks/dnszone_add_without_forwarder.yml

@@ -0,0 +1,10 @@
+---
+- name: Playbook to ensure the DNS zones is present without forwarder as well.
+  hosts: ipaserver
+
+  tasks:
+  - name: Ensure DNS zone is present without forwarders
+    ipadnszone:
+      ipaadmin_password: SomeADMINpassword
+      name: 01testzone.test
+      forwarders: []