change visibility of...

change visibility of EntityTypePropertyTypeSelectionWidget.EntityTypePropertyTypeComboModel from private to package protected in order to fix compilation error in my Eclipse environment and in the build in integration tests

SVN: 13180

openbis/source/java/ch/systemsx/cisd/openbis/generic/client/web/client/application/ui/property_type/EntityTypePropertyTypeSelectionWidget.java

@@ -52,7 +52,7 @@ public final class EntityTypePropertyTypeSelectionWidget
 
     private static final String SUFFIX = "entity-type-property-type";
 
-    private static class EntityTypePropertyTypeComboModel extends BaseModelData
+    static class EntityTypePropertyTypeComboModel extends BaseModelData
     {
         private static final long serialVersionUID = 1L;