Integrate Trifon's change from trunk revision 5700

Buf Fix: [ 2017673 ] Export Report as Excel - Bad Encoding
https://sourceforge.net/tracker/?func=detail&atid=879332&aid=2017673&group_id=176962

base/src/org/adempiere/impexp/AbstractExcelExporter.java

@@ -329,6 +329,8 @@ public abstract class AbstractExcelExporter
 				if (isColumnPrinted(col))
 				{
 					HSSFCell cell = row.createCell(colnum);
+					cell.setEncoding(HSSFCell.ENCODING_UTF_16); // Bug-2017673 - Export Report as Excel - Bad Encoding
+					
 					// line row
 					Object obj = getValueAt(rownum, col);
 					int displayType = getDisplayType(rownum, col);