Remove "Delete Pool" button when a pool is connected to a VIP

Option "Delete Pool" doesn't appear in pool row if there is a
VIP created for this pool.

This patch set partially fixes bug 1234659

Change-Id: I40357dc76943d644de7782275dde3c34fe7faf42

openstack_dashboard/dashboards/project/loadbalancers/tables.py

@@ -83,6 +83,11 @@ class DeletePoolLink(tables.DeleteAction):
     data_type_singular = _("Pool")
     data_type_plural = _("Pools")
 
+    def allowed(self, request, datum=None):
+        if datum and datum.vip_id:
+            return False
+        return True
+
 
 class DeleteMonitorLink(tables.DeleteAction):
     name = "deletemonitor"