0040972: When clicking 'Manage Variant' to create a variant of a product, the new product date is the same as the generic.

--- a/src/org/openbravo/materialmgmt/actionhandler/ManageVariants.java	2019-05-29 11:36:21.674516000 +0200
+++ b/src/org/openbravo/materialmgmt/actionhandler/ManageVariants.java	2019-05-29 11:41:00.844092122 +0200
@@ -20,6 +20,7 @@
 
 import java.math.BigDecimal;
 import java.util.Collections;
+import java.util.Date;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -111,6 +112,7 @@
       variant.getProductTrlList().clear();
     }
 
+    variant.setCreationDate(new Date());
     variant.setGenericProduct(generic);
     variant.setProductAccountsList(Collections.<ProductAccounts> emptyList());
     variant.setGeneric(false);