UIMA-3939 Prevent share count from going negative during node failure.  Sigh.


git-svn-id: https://svn.apache.org/repos/asf/uima/sandbox/uima-ducc/trunk@1609504 13f79535-47bb-0310-9956-ffa450edef68
UIMA-3939 Properly count node failures.  Pre-this it was off by two!


git-svn-id: https://svn.apache.org/repos/asf/uima/sandbox/uima-ducc/trunk@1609505 13f79535-47bb-0310-9956-ffa450edef68