resolve conflict on missing IpV4Validator

src/app/shared/shared.module.ts

@@ -297,6 +297,7 @@ import {
 import {
   TabulatableResultListElementsComponent
 } from './object-list/search-result-list-element/tabulatable-search-result/tabulatable-result-list-elements.component';
+import { IpV4Validator } from "./utils/ipV4.validator";
 
 const MODULES = [
   CommonModule,
@@ -513,6 +514,7 @@ const DIRECTIVES = [
   MetadataFieldValidator,
   HoverClassDirective,
   ContextHelpDirective,
+  IpV4Validator
 ];
 
 @NgModule({