Fix #54891 - correct javadoc on HSSF + SS (XSSF was correct) for Row.createCell(int,int)

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1479639 13f79535-47bb-0310-9956-ffa450edef68
Where possible, allow fetching of the size of the OPC Package Part (-1 if not)

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1482647 13f79535-47bb-0310-9956-ffa450edef68