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>Percent</li>
	 * <li>Scientific</li>
	 * <li>Standard</li>
	 * <li>pattern string, such as "###,##0", "###,##0.00 'm/s'", "###.#\';';#"
	 * and so on.</li>
	 * </ul>
	 * </td>
	 * </tr>
	 * <tr>
	 * <td width="16%">Date time</td>
	 * <td width="84%">
	 * <ul>
	 * <li>General Date</li>
	 * <li>Long Date</li>
	 * <li>Medium Date</li>
	 * <li>Short Date</li>
	 * <li>Long Time</li>
	 * <li>Medium Time</li>
	 * <li>Short Time</li>
	 * <li>pattern string, such as "MM/dd/yyyy hh:mm:ss a", "yyyy-MM-dd
	 * HH:mm:ss" and so on.</li>
	 * </ul>
	 * </td>
	 * </tr>
	 * <tr>
	 * <td width="16%">String</td>
	 * <td width="84%">
	 * <ul>
	 * <li>Upper case</li>
	 * <li>Lower case</li>