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
* Validates a input parameter value with the given data type, format choice
	 * string. The returned value is locale and pattern dependent. The data type
	 * and the format can be one pair of the following:
	 * <p>
	 * <table border="1" cellpadding="0" cellspacing="0" style="border-collapse:
	 * collapse" bordercolor="#111111" width="36%" id="AutoNumber1">
	 * <tr>
	 * <td width="16%">Data Type</td>
	 * <td width="84%">Format Type</td>
	 * </tr>
	 * <tr>
	 * <td width="16%">Float/Decimal</td>
	 * <td width="84%">
	 * <ul>
	 * <li>General Number</li>
	 * <li>Currency</li>
	 * <li>Fixed</li>
	 * <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>