propagate sendGroupUpdate flag to approval bean

bwreg-service/src/main/java/edu/kit/scc/webreg/service/reg/impl/RegisterUserServiceImpl.java

@@ -215,7 +215,7 @@ public class RegisterUserServiceImpl implements RegisterUserService {
 				auditor.finishAuditTrail();
 				if (parentAuditor == null)
 					auditor.commitAuditTrail();
-				approvalService.approve(registry, executor, auditor);
+				approvalService.approve(registry, executor, sendGroupUpdate, auditor);
 			}
 			
 			return registry;