Bug 152560 PDF doesn't display bottom Border in inner group footer properly
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/layout/pdf/PDFTableLM.java
.createTableArea( (ITableContent) content );
		root.setWidth( tableWidth );
		if ( !isFirst )
		{
			root.getStyle( ).setMarginTop( "0" ); 
		}
	}
	public TableLayoutInfo getLayoutInfo( )
	{
		return this.layoutInfo;
	}
	protected void buildTableLayoutInfo( )
	{
		
		this.layoutInfo = resolveTableLayoutInfo( (TableArea)root );
	}
	protected void newContext( )
	{
		createRoot( );
		buildTableLayoutInfo( );
		root.setWidth( layoutInfo.getTableWidth( ) );
		setMaxAvaHeight( getAvaHeight( ) );
		setMaxAvaWidth( layoutInfo.getTableWidth( ) );
		setCurrentIP( 0 );
		setCurrentBP( 0 );
		repeatRowCount = 0;
		setCurrentIP( 0 );
	}
	protected int getAvaHeight( )
	{