Upgrade to Elasticsearch 5.4.1

Closes gh-9476

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/data/elasticsearch/ElasticsearchAutoConfigurationTests.java

@@ -19,6 +19,7 @@ package org.springframework.boot.autoconfigure.data.elasticsearch;
 import org.elasticsearch.client.Client;
 import org.elasticsearch.client.node.NodeClient;
 import org.junit.After;
+import org.junit.Before;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.ExpectedException;
@@ -45,11 +46,17 @@ public class ElasticsearchAutoConfigurationTests {
 
 	private AnnotationConfigApplicationContext context;
 
+	@Before
+	public void preventElasticsearchFromConfiguringNetty() {
+		System.setProperty("es.set.netty.runtime.available.processors", "false");
+	}
+
 	@After
 	public void close() {
 		if (this.context != null) {
 			this.context.close();
 		}
+		System.clearProperty("es.set.netty.runtime.available.processors");
 	}
 
 	@Test

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/elasticsearch/jest/JestAutoConfigurationTests.java

@@ -34,6 +34,7 @@ import org.elasticsearch.client.node.NodeClient;
 import org.elasticsearch.index.query.QueryBuilders;
 import org.elasticsearch.search.builder.SearchSourceBuilder;
 import org.junit.After;
+import org.junit.Before;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.ExpectedException;
@@ -64,6 +65,11 @@ import static org.mockito.Mockito.mock;
  */
 public class JestAutoConfigurationTests {
 
+	@Before
+	public void preventElasticsearchFromConfiguringNetty() {
+		System.setProperty("es.set.netty.runtime.available.processors", "false");
+	}
+
 	@Rule
 	public ExpectedException thrown = ExpectedException.none();
 
@@ -74,6 +80,7 @@ public class JestAutoConfigurationTests {
 		if (this.context != null) {
 			this.context.close();
 		}
+		System.clearProperty("es.set.netty.runtime.available.processors");
 	}
 
 	@Test

spring-boot-dependencies/pom.xml

@@ -76,7 +76,7 @@
 		<embedded-mongo.version>2.0.0</embedded-mongo.version>
 		<flyway.version>4.2.0</flyway.version>
 		<freemarker.version>2.3.26-incubating</freemarker.version>
-		<elasticsearch.version>5.4.0</elasticsearch.version>
+		<elasticsearch.version>5.4.1</elasticsearch.version>
 		<glassfish-el.version>3.0.0</glassfish-el.version>
 		<groovy.version>2.4.11</groovy.version>
 		<gson.version>2.8.1</gson.version>