checkstyle fixes

src/test/java/io/confluent/connect/elasticsearch/integration/ElasticsearchConnectorBaseIT.java

@@ -20,16 +20,7 @@
 import io.confluent.connect.elasticsearch.ElasticsearchClient;
 import io.confluent.connect.elasticsearch.ElasticsearchSinkConnector;
 import io.confluent.connect.elasticsearch.jest.JestElasticsearchClient;
-import org.apache.kafka.clients.producer.KafkaProducer;
-import org.apache.kafka.clients.producer.ProducerConfig;
-import org.apache.kafka.clients.producer.ProducerRecord;
-import org.apache.kafka.common.KafkaException;
-import org.apache.kafka.common.serialization.ByteArraySerializer;
-import org.apache.kafka.connect.data.Schema;
-import org.apache.kafka.connect.data.SchemaBuilder;
-import org.apache.kafka.connect.data.Struct;
 import org.apache.kafka.connect.json.JsonConverter;
-import org.apache.kafka.connect.storage.Converter;
 import org.apache.kafka.connect.storage.StringConverter;
 import org.apache.kafka.test.TestUtils;
 import org.junit.After;
@@ -38,11 +29,8 @@
 import org.junit.BeforeClass;
 
 import java.io.IOException;
-import java.util.ArrayList;
 import java.util.HashMap;
-import java.util.List;
 import java.util.Map;
-import java.util.concurrent.TimeUnit;
 
 import static io.confluent.connect.elasticsearch.ElasticsearchSinkConnectorConfig.CONNECTION_URL_CONFIG;
 import static io.confluent.connect.elasticsearch.ElasticsearchSinkConnectorConfig.IGNORE_KEY_CONFIG;

src/test/java/io/confluent/connect/elasticsearch/integration/ElasticsearchConnectorDataFormatIT.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2020 Confluent Inc.
+ *
+ * Licensed under the Confluent Community License (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.confluent.io/confluent-community-license
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OF ANY KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations under the License.
+ */
+
 package io.confluent.connect.elasticsearch.integration;
 
 import io.confluent.connect.avro.AvroConverter;
@@ -53,7 +68,7 @@ protected void waitForSchemaRegistryToStart() throws InterruptedException {
     TestUtils.waitForCondition(
         () -> restApp.restServer.isRunning(),
         CONNECTOR_STARTUP_DURATION_MS,
-        "Connector tasks did not start in time."
+        "Schema-registry server did not start in time."
     );
   }
 

src/test/java/io/confluent/connect/elasticsearch/integration/ElasticsearchConnectorSecureIT.java

@@ -17,7 +17,6 @@
 
 import io.confluent.common.utils.IntegrationTest;
 import io.confluent.connect.elasticsearch.ElasticsearchClient;
-import io.confluent.connect.elasticsearch.ElasticsearchSinkConnectorConfig;
 import io.confluent.connect.elasticsearch.SecurityProtocol;
 import io.confluent.connect.elasticsearch.jest.JestElasticsearchClient;
 import org.apache.kafka.common.config.SslConfigs;

src/test/java/io/confluent/connect/elasticsearch/integration/ElasticsearchContainer.java

@@ -9,11 +9,8 @@
 import java.io.IOException;
 import java.io.InputStream;
 import java.net.InetAddress;
-import java.net.MalformedURLException;
 import java.net.URI;
 import java.net.URISyntaxException;
-import java.net.URL;
-import java.net.UnknownHostException;
 import java.time.Duration;
 import java.util.concurrent.Future;