Upgrade to Spring AMQP 1.5.3

Closes gh-4484

Author: philwebb

spring-boot-dependencies/pom.xml

@@ -129,7 +129,7 @@
 		<solr.version>4.10.4</solr.version>
 		<spock.version>1.0-groovy-2.4</spock.version>
 		<spring.version>4.2.3.BUILD-SNAPSHOT</spring.version>
-		<spring-amqp.version>1.5.1.RELEASE</spring-amqp.version>
+		<spring-amqp.version>1.5.2.RELEASE</spring-amqp.version>
 		<spring-cloud-connectors.version>1.2.0.RELEASE</spring-cloud-connectors.version>
 		<spring-batch.version>3.0.5.RELEASE</spring-batch.version>
 		<spring-data-releasetrain.version>Gosling-RELEASE</spring-data-releasetrain.version>