UIMA-3900 Fix NPE when machines data returns null node.


git-svn-id: https://svn.apache.org/repos/asf/uima/sandbox/uima-ducc/trunk@1616000 13f79535-47bb-0310-9956-ffa450edef68
UIMA-3978 Add os.name and os.arch resolution to DuccProperties to better match
          Java properties expansion.


git-svn-id: https://svn.apache.org/repos/asf/uima/sandbox/uima-ducc/trunk@1616001 13f79535-47bb-0310-9956-ffa450edef68