Update to Spring Framework 4.2.0.RC2

Closes gh-3277

spring-boot-dependencies/pom.xml

@@ -123,7 +123,7 @@
 		<snakeyaml.version>1.15</snakeyaml.version>
 		<solr.version>4.10.4</solr.version>
 		<spock.version>1.0-groovy-2.4</spock.version>
-		<spring.version>4.2.0.BUILD-SNAPSHOT</spring.version>
+		<spring.version>4.2.0.RC2</spring.version>
 		<spring-amqp.version>1.5.0.M1</spring-amqp.version>
 		<spring-cloud-connectors.version>1.1.1.RELEASE</spring-cloud-connectors.version>
 		<spring-batch.version>3.0.4.RELEASE</spring-batch.version>