Bug 186940 Style name in theme cannot be identify by auto when reopen the library[01]
Description: Style name in theme cannot be identify by auto when reopen the library[01] Step: 1.Open a library and add a theme 2.New a style on the theme and use the default name that is "NewStyle" 3.Save the library, close it and reopen it again. 4.New another style on the same theme Actual result: The default style name on second times is also "NewStyle" Exception result: The default style name on second times is "NewStyle1"
model/org.eclipse.birt.report.model.tests/test/org/eclipse/birt/report/model/api/GroupElementHandleTest.java
* <p>
	 * 2.
	 * <ul>
	 * <li>ElemnetA(P1).</li>
	 * <li>ElemnetB(P1).</li>
	 * <li>ElemnetC(P3).</li>
	 * </ul>
	 * So, the result should be: A,B,C doesn't share common property.
	 * <p>
	 * 3.
	 * <ul>
	 * <li>ElementA(P1)</li>
	 * <li>ElementB(P2)</li>
	 * <li>ElementC(P3)</li>
	 * </ul>
	 * So, the result should be: A,B,C doesn't share common property.
	 * <p>
	 * 4. consider user properties.
	 * <ul>
	 * <li>ElementA(P1,UP1,UP2)</li>
	 * <li>ElementB(P2,UP1)</li>
	 * </ul>
	 * So, the result should be: A,B share common property UP1.
	 * <p>
	 * Also, test to see the handle is mutable.
	 * 
	 * @throws MetaDataException
	 */
	public void testGetCommonProperties( ) throws MetaDataException
	{