Move some system wide setup to the common place for such things.

git-svn-id: https://svn.apache.org/repos/asf/jena/trunk@1517163 13f79535-47bb-0310-9956-ffa450edef68
Correct comments.

git-svn-id: https://svn.apache.org/repos/asf/jena/trunk@1517164 13f79535-47bb-0310-9956-ffa450edef68