Upgrade to Elasticsearch 6.3.2

Closes gh-14108

Author: snicoll

spring-boot-project/spring-boot-dependencies/pom.xml

@@ -60,7 +60,7 @@
 		<embedded-mongo.version>2.1.1</embedded-mongo.version>
 		<flyway.version>5.1.4</flyway.version>
 		<freemarker.version>2.3.28</freemarker.version>
-		<elasticsearch.version>6.3.1</elasticsearch.version>
+		<elasticsearch.version>6.3.2</elasticsearch.version>
 		<glassfish-el.version>3.0.0</glassfish-el.version>
 		<groovy.version>2.5.2</groovy.version>
 		<gson.version>2.8.5</gson.version>