[stable-2.6] Start dbus when setting up postgresql tests.

(cherry picked from commit c309570540)

Co-authored-by: Matt Clay <matt@mystile.com>

test/integration/targets/setup_postgresql_db/tasks/main.yml

@@ -17,6 +17,12 @@
         - 'default{{ python_suffix }}.yml'
       paths: '../vars'
 
+- name: make sure the dbus service is started under systemd
+  systemd:
+    name: dbus
+    state: started
+  when: ansible_service_mgr == 'systemd' and ansible_distribution == 'Fedora'
+
 # Make sure we start fresh
 - name: stop postgresql service
   service: name={{ postgresql_service }} state=stopped