feat: Staffeln support (#588)

Co-authored-by: Oleksandr Kozachenko <okozachenko1203@gmail.com>
Co-authored-by: Mohammed Naser <mnaser@vexxhost.com>
diff --git a/playbooks/openstack.yml b/playbooks/openstack.yml
index fd26dd6..5f3827b 100644
--- a/playbooks/openstack.yml
+++ b/playbooks/openstack.yml
@@ -102,6 +102,11 @@
       tags:
         - glance
 
+    - role: staffeln
+      when: atmosphere_staffeln_enabled | default(true)
+      tags:
+        - staffeln
+
     - role: cinder
       tags:
         - cinder