Mailman: add RPM GPG key

roles/mailman/tasks/main.yml

@@ -38,6 +38,9 @@
   copy: src=hyperkitty.{{ansible_distribution}}.repo
         dest=/etc/yum.repos.d/hyperkitty.repo
 
+- name: add the GPG key
+  rpm_key: state=present key=http://repos.fedorapeople.org/repos/abompard/abompard.asc
+
 - name: install needed packages
   yum: pkg={{ item }} state=installed
   with_items: