Merge pull request #5923 from garyrussell:si43RC1

* pr/5923:
  Upgrade to Spring Integration 4.3.0.RC1

spring-boot-dependencies/pom.xml

@@ -147,7 +147,7 @@
 		<spring-batch.version>3.0.7.RELEASE</spring-batch.version>
 		<spring-data-releasetrain.version>Hopper-SR1</spring-data-releasetrain.version>
 		<spring-hateoas.version>0.19.0.RELEASE</spring-hateoas.version>
-		<spring-integration.version>4.3.0.M2</spring-integration.version>
+		<spring-integration.version>4.3.0.RC1</spring-integration.version>
 		<spring-integration-java-dsl.version>1.1.2.RELEASE</spring-integration-java-dsl.version>
 		<spring-loaded.version>1.2.6.RELEASE</spring-loaded.version>
 		<spring-mobile.version>1.1.5.RELEASE</spring-mobile.version>