UIMA-3923 DUCC Orchestrator (OR) upon receipt of node inventory does not immediately advance Job state from Completing to Completed even though process count == 0

git-svn-id: https://svn.apache.org/repos/asf/uima/sandbox/uima-ducc/trunk@1606872 13f79535-47bb-0310-9956-ffa450edef68