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
assertEquals( X1 + IN, item.getX( ) );
		item.setX( X2 );
		assertEquals( X2, item.getX( ) );
		item.setY( Y1 );
		assertEquals( Y1 + IN, item.getY( ) );
		item.setY( Y2 );
		assertEquals( Y2, item.getY( ) );
	}
	public void testLabel( ) throws ScriptException, SemanticException
	{
		LabelHandle labelHandle = factory.newLabel( LABEL );
		ILabel label = new Label( labelHandle );
		doTestReportElement( label );
		doTestReportItem( label );
		doTestAction( labelHandle );
		label.setHelpText( HELP_TEXT );
		assertEquals( HELP_TEXT, label.getHelpText( ) );
		label.setHelpTextKey( HELP_TEXT_KEY );
		assertEquals( HELP_TEXT_KEY, label.getHelpTextKey( ) );
		label.setText( TEXT );
		assertEquals( TEXT, label.getText( ) );
		label.setTextKey( TEXT_KEY );
		assertEquals( TEXT_KEY, label.getTextKey( ) );
	}
	public void testCell( ) throws ScriptException
	{
		CellHandle cellHandle = factory.newCell( );
		ICell cell = new Cell( cellHandle );
		cell.setColumn( 2 );
		assertEquals( 2, cell.getColumn( ) );