REPORT-33691 tr\td\th设置单元格对齐方式，预览生效，导出不生效

fine-itext/src/main/java/com/fr/third/v2/lowagie/text/html/simpleparser/IncCell.java

@@ -70,6 +70,7 @@ public class IncCell implements TextElementArray {
      */
     public IncCell(String tag, ChainedProperties props) {
         cell = new PdfPCell((Phrase) null);
+        cell.setHorizontalAlignment(Element.ALIGN_UNDEFINED);
         String value = props.getProperty("colspan");
         if (value != null)
             cell.setColspan(Integer.parseInt(value));