fix overview integration tests

Author: uds5501

tests/integration/components/events/view/overview/event-tickets-test.js

@@ -12,7 +12,10 @@ module('Integration | Component | events/view/overview/event tickets', function(
         paymentCurrency: 'USD'
       }
     });
-    await render(hbs`{{events/view/overview/event-tickets data=model}}`);
+    this.set('tickets', 10);
+    this.set('orders', 10);
+    this.set('sales', 100);
+    await render(hbs`{{events/view/overview/event-tickets data=model tickets=tickets orders=orders sales=sales}}`);
     assert.ok(this.element.innerHTML.trim().includes('Tickets'));
   });
 });