Bug 160429 Drag the datasource and dataset and produce an error gradation in data explorer
Details: Drag the datasource and dataset and produce an error gradation in data explorer Step: 1.New 4 datasource named d1, d2, d3, d4. 2.Drag the datasource in data explorer to change the gradation. (1) Drag d1 between d2 and d3. (2) Drag d2 between d3 and d4. (3) Drag d4 between d2 and d3. (4) Drag d4 to the top. (5) Drag d3 between d1 and d2. (6) Drag d3 to the top. Actual result: (1) d1 will be move to bottom. (2) d2 will be move to bottom. (3) d4 will not be move to anywhere. (4) d4 will not be move to anywhere. (5) d3 will be move to bottom. (6) d3 will be move to bottom. Excepted result: The datasource will be move to the correct station.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/ModuleHandle.java
* @param handle
	 *            the handle to the parameter group.
	 */
	private void addParameters( ArrayList list, ParameterGroupHandle handle )
	{
		SlotHandle h = handle.getParameters( );
		Iterator it = h.iterator( );
		while ( it.hasNext( ) )
		{
			list.add( it.next( ) );
		}
	}
	/**
	 * Adds a new translation to the design.
	 * 
	 * @param resourceKey
	 *            resource key for the message
	 * @param locale
	 *            the string value of a locale for the translation. Locale
	 *            should be in java-defined format( en, en-US, zh_CN, etc.)
	 * @param text
	 *            translated text for the locale
	 * 
	 * @throws CustomMsgException
	 *             if the resource key is duplicate or missing, or locale is not
	 *             a valid format.
	 * 
	 * @see #getTranslation(String, String)
	 */
	public void addTranslation( String resourceKey, String locale, String text )