Fix detecting missing downloaded and compiled OOXML jars, remove older versions of apache-rat correctly

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1631249 13f79535-47bb-0310-9956-ffa450edef68
Enhance test and coverge for class TempFile

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1631250 13f79535-47bb-0310-9956-ffa450edef68