ceph-infra: install firewalld python bindings

When using the firewalld ansible module we need to be sure that the
python bindings are installed.

Signed-off-by: Dimitri Savineau <dsavinea@redhat.com>

roles/ceph-infra/tasks/configure_firewall.yml

@@ -13,6 +13,12 @@
       or is_atomic | bool)
   tags: firewall
   block:
+    - name: install firewalld python binding
+      package:
+        name: "python{{ ansible_python.version.major }}-firewall"
+      tags: with_pkg
+      when: not is_atomic | bool
+
     - name: start firewalld
       service:
         name: firewalld