revert, not close, XSSFWorkbooks created by WorkbookFactory in order to avoid modifying SampleSS.xlsx (this bug will be addressed in a future commit). Since r1721468

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1722079 13f79535-47bb-0310-9956-ffa450edef68

src/ooxml/testcases/org/apache/poi/ss/TestWorkbookFactory.java

@@ -85,6 +85,7 @@ public final class TestWorkbookFactory extends TestCase {
         assertNotNull(wb);
         assertTrue(wb instanceof XSSFWorkbook);
         // TODO: this re-writes the sample-file?! wb.close();
+        revert(wb);
     }
 
     public void testCreateReadOnly() throws Exception {