Fix for UUID V1 generation - signed bytes leaking bits to high end of the node see number.

git-svn-id: https://svn.apache.org/repos/asf/jena/trunk@1597811 13f79535-47bb-0310-9956-ffa450edef68
Ensure no property function processing attempted if property functions are turned off.

git-svn-id: https://svn.apache.org/repos/asf/jena/trunk@1597813 13f79535-47bb-0310-9956-ffa450edef68