DataSourceEnumField potential bug with validation warnings

[pH4Lk0n]

Hello,

I've found a problem with validation errors when field is created as DataSourceEnumField and using `when` conditions.
See this test case:

        DataSource ds = new DataSource();
        ds.setClientOnly(true);

        DataSourceIntegerField fieldId = new DataSourceIntegerField("id");
        fieldId.setPrimaryKey(true);
        ds.addField(fieldId);
        ds.addField(new DataSourceTextField("field1"));
        ds.addField(new DataSourceTextField("field2"));

        DataSourceEnumField fieldStatus = new DataSourceEnumField("status");

        LinkedHashMap<String,String> map = new LinkedHashMap<String,String>();
        map.put("new", "NEW");
        map.put("progress", "Progress");
        map.put("finished", "Finished");
        map.put("canceled", "Canceled");
        fieldStatus.setValueMap(map);
// fieldStatus.setValueMap("new", "progress", "finished", "canceled");
        ds.addField(fieldStatus);

        VLayout layout1 = new VLayout(5);
        layout1.setGroupTitle("vm1");

        ValuesManager vm1 = new ValuesManager();
        vm1.setDataSource(ds);

        DynamicForm form1 = new DynamicForm();
        form1.setDataSource(ds);
        form1.setValuesManager(vm1);

        TextItem itemField1 = new TextItem("field1");
        itemField1.setReadOnlyWhen(new AdvancedCriteria("status", OperatorId.IN_SET, new String[] {"finished", "canceled"}));

        SelectItem itemStatus = new SelectItem("status");
        itemStatus.setRedrawOnChange(true);

        form1.setFields(
                new TextItem("id"),
                itemField1,
                itemStatus
        );
        layout1.addMember(form1);

        DynamicForm form2 = new DynamicForm();
        form2.setDataSource(ds);
        form2.setValuesManager(vm1);

        TextItem itemField2 = new TextItem("field2");
        itemField2.setReadOnlyWhen(new AdvancedCriteria("status", OperatorId.IN_SET, new String[] {"finished", "canceled"}));

        form2.setFields(
                itemField2
        );
        layout1.addMember(form2);

        this.addChild(layout1);

Running this code and changing status field value creates multiple warnings in console:

TMR6:WARN:validation:isOneOf validator specified with no specified list of options or valueMap - validator will always fail. Field definition:null

When just changing DataSourceEnumField to DataSourceTextField all warnings disappear.

Best regards
Mariusz Goch