wait for relations-api before e2e tests

deploy/kind/e2e/e2e-batch.yaml

@@ -20,6 +20,13 @@ spec:
                 sleep 5
               done
               echo "Inventory service is ready!"
+              
+              echo "Waiting for relations-service to be ready..."
+              while ! curl -s http://relationships-service:9000/api/authz/readyz; do
+                echo "Relations service not ready yet. Sleeping for 5 seconds..."
+                sleep 5
+              done
+              echo "Inventory service is ready!"
       containers:
         - name: e2e-http-tests
           image: localhost/inventory-e2e-tests:e2e-test