the subdir element needs to be included otherwise certain xmlbean operations (e.g. selectPath) can't find the corresponding xmlbeans classes

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1640846 13f79535-47bb-0310-9956-ffa450edef68
Don't swallow exceptions on validation

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1641025 13f79535-47bb-0310-9956-ffa450edef68