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
* @param dataType
	 *            the data type of the value
	 * @param format
	 *            the format pattern
	 * @param value
	 *            the value to validate
	 * @param locale
	 *            the locale information
	 * @return the double value if the validation is successful
	 * @throws ValidationValueException
	 *             if the value to validate is invalid
	 */
	static private Number doValidateNumberByPattern( String dataType,
			String format, String value, ULocale locale )
			throws ValidationValueException
	{
		assert DesignChoiceConstants.PARAM_TYPE_FLOAT
				.equalsIgnoreCase( dataType )
				|| DesignChoiceConstants.PARAM_TYPE_DECIMAL
						.equalsIgnoreCase( dataType )
				|| DesignChoiceConstants.PARAM_TYPE_INTEGER
						.equalsIgnoreCase( dataType );
		if ( DesignChoiceConstants.NUMBER_FORMAT_TYPE_UNFORMATTED
				.equalsIgnoreCase( format ) )
			return doValidateNumber( dataType, value, locale );
		assert !StringUtil.isBlank( format );
		if ( StringUtil.isBlank( value ) )
			return null;
		NumberFormatter formatter = new NumberFormatter( locale );
		formatter.applyPattern( format );