UIMA-3900 Viz updates - turn off debug logging.


git-svn-id: https://svn.apache.org/repos/asf/uima/sandbox/uima-ducc/trunk@1608801 13f79535-47bb-0310-9956-ffa450edef68
UIMA-3937 fix division by zero exception

git-svn-id: https://svn.apache.org/repos/asf/uima/sandbox/uima-ducc/trunk@1608823 13f79535-47bb-0310-9956-ffa450edef68