OPENOLAT-511: disable duplicate email check in the user web service

src/main/java/org/olat/user/restapi/UserWebService.java

@@ -837,6 +837,7 @@ public class UserWebService {
 			String translation = translator.translate(error.getErrorKey(), error.getArgs());
 			errors.add(new ErrorVO(pack, error.getErrorKey(), translation));
 			return false;
+		/**** DISABLED DUPLICATE EMAIL CHECK @UIBK
 		} else if((userPropertyHandler.getName().equals(UserConstants.INSTITUTIONALEMAIL) || userPropertyHandler.getName().equals(UserConstants.EMAIL))
 				&& StringHelper.containsNonWhitespace(value)) {
 			
@@ -848,7 +849,7 @@ public class UserWebService {
 				Translator translator = new PackageTranslator(pack, locale);
 				String translation = translator.translate("form.name." + userPropertyHandler.getName() + ".error.exists");
 				errors.add(new ErrorVO("org.olat.user.propertyhandlers:new.form.name." + userPropertyHandler.getName() + ".exists", translation));
-			}
+			}*/
 		}
 		
 		return true;