SOLR-18318: Tidy up changes made in PR#4661 (apache#4680)

Author: epugh

solr/api/src/java/org/apache/solr/client/api/model/NodeSystemResponse.java

@@ -20,10 +20,10 @@
 import com.fasterxml.jackson.annotation.JsonAnySetter;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import java.util.Date;
+import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
-import java.util.LinkedHashMap;
 
 /** Response from /node/system */
 public class NodeSystemResponse extends SolrJerseyResponse {

solr/core/src/test/org/apache/solr/handler/admin/api/GetNodeSystemInfoSolrCloudTest.java

@@ -1,3 +1,19 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package org.apache.solr.handler.admin.api;
 
 import org.apache.solr.client.solrj.request.CollectionAdminRequest;