Updating the FlinkBlueGreenDeploymentSpecDiffTest

Author: schongloo

flink-kubernetes-operator/src/test/java/org/apache/flink/kubernetes/operator/reconciler/diff/FlinkBlueGreenDeploymentSpecDiffTest.java

@@ -19,6 +19,7 @@
 
 import org.apache.flink.configuration.MemorySize;
 import org.apache.flink.kubernetes.operator.api.bluegreen.BlueGreenDiffType;
+import org.apache.flink.kubernetes.operator.api.spec.ConfigObjectNode;
 import org.apache.flink.kubernetes.operator.api.spec.FlinkBlueGreenDeploymentSpec;
 import org.apache.flink.kubernetes.operator.api.spec.FlinkDeploymentSpec;
 import org.apache.flink.kubernetes.operator.api.spec.FlinkDeploymentTemplateSpec;
@@ -284,6 +285,7 @@ private FlinkBlueGreenDeploymentSpec createBasicSpec() {
                         .image("flink:1.16")
                         .flinkVersion(FlinkVersion.v1_16)
                         .serviceAccount("flink")
+                        .flinkConfiguration(new ConfigObjectNode())
                         .jobManager(
                                 JobManagerSpec.builder()
                                         .resource(