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
* <li>pattern string, such as "lt!" and so on.</li>
	 * </ul>
	 * </td>
	 * </tr>
	 * </table>
	 * 
	 * @param dataType
	 *            the data type of the value
	 * @param format
	 *            the format choice string
	 * @param value
	 *            the input value to validate
	 * @param locale
	 *            the locale information
	 * @return the validated value if the input value is valid for the given
	 *         data type and format choice string
	 * @throws ValidationValueException
	 *             if the input value is not valid with the given data type and
	 *             format string
	 */
	static public Object validate( String dataType, String format,
			String value, ULocale locale ) throws ValidationValueException
	{
		if ( value == null )
			return null;
		if ( StringUtil.isBlank( format ) )
			return validate( dataType, value, locale );
		try
		{
			if ( DesignChoiceConstants.PARAM_TYPE_DATETIME