Upgrade to Spring LDAP 2.4.0

Closes #327

Author: christophstrobl

pom.xml

@@ -18,7 +18,7 @@
 	</parent>
 
 	<properties>
-		<spring-ldap>2.4.0-RC1</spring-ldap>
+		<spring-ldap>2.4.0</spring-ldap>
 		<springdata.commons>2.7.0-SNAPSHOT</springdata.commons>
 		<java-module-name>spring.data.ldap</java-module-name>
 	</properties>