Include inner exception when re-throwing

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1917176 13f79535-47bb-0310-9956-ffa450edef68

poi-ooxml/src/test/java/org/apache/poi/extractor/ooxml/TestExtractorFactory.java

@@ -180,7 +180,7 @@ class TestExtractorFactory {
             testExtractor(ext, testcase, extractor, count);
             pkg.revert();
         } catch (Exception e) {
-            throw new Exception("While handling " + testcase + " - " + testFile + " - " + extractor);
+            throw new Exception("While handling " + testcase + " - " + testFile + " - " + extractor, e);
         }
     }