Upgrade to Ehcache3 3.2.1

Closes gh-8453

spring-boot-dependencies/pom.xml

@@ -70,7 +70,7 @@
 		<dom4j.version>1.6.1</dom4j.version>
 		<dropwizard-metrics.version>3.1.3</dropwizard-metrics.version>
 		<ehcache.version>2.10.3</ehcache.version>
-		<ehcache3.version>3.2.0</ehcache3.version>
+		<ehcache3.version>3.2.1</ehcache3.version>
 		<embedded-mongo.version>1.50.5</embedded-mongo.version>
 		<flyway.version>3.2.1</flyway.version>
 		<freemarker.version>2.3.25-incubating</freemarker.version>