Updated Spring version.

sandbox/heavyduty/pom.xml

@@ -184,7 +184,7 @@
         </plugins>
     </build>
     <properties>        
-        <spring.version>2.5.5</spring.version>
+        <spring.version>2.5.6</spring.version>
         <spring.security.version>2.5.0-SNAPSHOT</spring.security.version>
     </properties>