Bug 168172 Add the get() and set() functions of HideDetail parameter on IGroup
Add the get() and set() functions of HideDetail parameter on IGroup, and thus enable the hidedetail shifting on the Group through eventhandler.
engine/org.eclipse.birt.report.engine.tests/test/org/eclipse/birt/report/engine/api/script/element/ElementTest.java
private static final String TEXT_KEY = "textKey";
	private static final String TEXT = "text";
	private static final String HELP_TEXT_KEY = "helpTextKey";
	private static final String HELP_TEXT = "helpText";
	private static final String LABEL = "Label";
	private static final String Y2 = "40cm";
	private static final String X2 = "30cm";
	private static final String TOC = "TOC";
	private static final String WIDTH2 = "20cm";
	private static final String HEIGHT2 = "10cm";
	private static final String BOOKMARK = "bookmark";
	private static final String USER_PROP = "userProp";
	private static final String USER_PROP2 = "userProp2";
	private static final String INTEGER = "integer";
	private static final String USER_PROP1 = "userProp1";
	private static final String EXPRESSION = "expression";
	private static final String NAMED_EXPRESSION = "namedExpression";
	private static final String NAME = "name";
	private static final String DISPLAY_NAME_KEY = "displayNameKey";
	private static final String DISPLAY_NAME = "displayName";
	private static final String XML = "<xml/>";
	private static final String COMMENTS = "comments";
	private static final String IMAGE_FILE = "imageFile";
	private ElementFactory factory;
	private ReportDesignHandle designHandle;
	public void setUp( )
	{
		SessionHandle sessionHandle = new DesignEngine( new DesignConfig( ) )
				.newSessionHandle( ULocale.ENGLISH );
		designHandle = sessionHandle.createDesign( );