Add unit test which verifies that ThresholdInputStream can be used. This currently fails with Java 10 because the reflection relies on internals of class ZipFile that were changed.
poi/trunk/src/ooxml/testcases/org/apache/poi/openxml4j/util/
poi/trunk/src/ooxml/testcases/org/apache/poi/openxml4j/util/TestZipSecureFile.java