Upgrade to Spring Web Services 2.4.0.RELEASE

Closes gh-7185

spring-boot-dependencies/pom.xml

@@ -167,7 +167,7 @@
 		<spring-social-facebook.version>2.0.3.RELEASE</spring-social-facebook.version>
 		<spring-social-linkedin.version>1.0.2.RELEASE</spring-social-linkedin.version>
 		<spring-social-twitter.version>1.1.2.RELEASE</spring-social-twitter.version>
-		<spring-ws.version>2.3.0.RELEASE</spring-ws.version>
+		<spring-ws.version>2.4.0.RELEASE</spring-ws.version>
 		<sqlite-jdbc.version>3.8.11.2</sqlite-jdbc.version>
 		<statsd-client.version>3.1.0</statsd-client.version>
 		<sun-mail.version>${javax-mail.version}</sun-mail.version>