Bug 155478 [regression]Numbers in cascading group displays incorrectly
Description: Numbers in cascading group displays incorrectly. Steps to reproduce: 1. New sample data source and dataset from table ORDERS. 2. New a cascading group with two sub parameters, the first is from STATUS and the second is from ORDERNUMBER. 3. Preview 4. Select a status value in poped up parameter dialog, see ordernumber list Expected result: See 10100, 10101, such kind of format. Actual result: I saw 10.100, 10.167..., I just listed out the numbers as example
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/util/ParameterValidationUtil.java
*         otherwise <code>null</code>
	 * @throws ValidationValueException
	 */
	static private Boolean doValidateBoolean( String value, ULocale locale )
			throws ValidationValueException
	{
		if ( StringUtil.isBlank( value ) )
			return null;
		
		if ( value.equalsIgnoreCase( BooleanPropertyType.TRUE ) )
			return Boolean.TRUE;
		else if ( value.equalsIgnoreCase( BooleanPropertyType.FALSE ) )
			return Boolean.FALSE;
		
		
		if ( value.equalsIgnoreCase( getMessage( locale,
				BooleanPropertyType.BOOLEAN_TRUE_RESOURCE_KEY ) ) )
		{
			return Boolean.TRUE;
		}
		else if ( value.equalsIgnoreCase( getMessage( locale,
				BooleanPropertyType.BOOLEAN_FALSE_RESOURCE_KEY ) ) )
		{
			return Boolean.FALSE;
		}
		throw new ValidationValueException( value,
				PropertyValueException.DESIGN_EXCEPTION_INVALID_VALUE,
				DesignChoiceConstants.PARAM_TYPE_BOOLEAN );
	}
	/**