Restart services when their credentials change

Fixes issue #76.

roles/credentials/tasks/install_certs.yml

@@ -64,6 +64,12 @@
         mode: 0640
       loop: "{{ float_host_service_credentials_certs }}"
 
+    # This should use the systemd module but it doesn't take lists of services.
+    - name: "Restart associated services"
+      shell: "systemctl restart {{ services[item.0.service].systemd_services | join(' ') }}"
+      when: "item.1.changed"
+      loop: "{{ float_host_service_credentials_certs | zip(x509_sign.results) | list }}"
+
   rescue:
     - debug:
         msg: "Failed to set up one or more credentials"