Add retry for pgbouncer restart handler (#638)

roles/pgbouncer/handlers/main.yml

@@ -9,6 +9,10 @@
   loop_control:
     index_var: idx
     label: "{{ 'pgbouncer' if idx == 0 else 'pgbouncer-%d' % (idx + 1) }}"
+  register: pgbouncer_restart_result
+  retries: 3
+  delay: 5
+  until: pgbouncer_restart_result is success
   listen: "restart pgbouncer"
 
 - name: Wait for port "{{ pgbouncer_listen_port }}" to become open on the host