Upgrade to Spring Cloud Connectors 1.2.4.RELEASE

Closes gh-9178

spring-boot-dependencies/pom.xml

@@ -147,7 +147,7 @@
 		<spock.version>1.0-groovy-2.4</spock.version>
 		<spring.version>4.3.8.RELEASE</spring.version>
 		<spring-amqp.version>1.6.9.RELEASE</spring-amqp.version>
-		<spring-cloud-connectors.version>1.2.3.RELEASE</spring-cloud-connectors.version>
+		<spring-cloud-connectors.version>1.2.4.RELEASE</spring-cloud-connectors.version>
 		<spring-batch.version>3.0.7.RELEASE</spring-batch.version>
 		<spring-data-releasetrain.version>Hopper-SR10</spring-data-releasetrain.version>
 		<spring-hateoas.version>0.20.0.RELEASE</spring-hateoas.version>