Seems we have slow connection on the Apache Jenkins instance. Thus allow one specific test to fail with a specific ConnectException as we see this happening sometimes in Jenkins but should not fail the unit test suite of POI because of such infrastructure problems

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1632566 13f79535-47bb-0310-9956-ffa450edef68