Upgrade to Spring Web Services 2.2.4.RELEASE

Closes gh-4789

spring-boot-dependencies/pom.xml

@@ -127,7 +127,7 @@
 		<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>2.2.3.RELEASE</spring-ws.version>
+		<spring-ws.version>2.2.4.RELEASE</spring-ws.version>
 		<sun-mail.version>${javax-mail.version}</sun-mail.version>
 		<thymeleaf.version>2.1.4.RELEASE</thymeleaf.version>
 		<thymeleaf-extras-springsecurity3.version>2.1.2.RELEASE</thymeleaf-extras-springsecurity3.version>