UIMA-3777 report process exit code as it. Remove code that reset exit code for some scenarios. The exit code is added to the IDuccProcess and its interpretation is left to a receiving component like DUCC WS

git-svn-id: https://svn.apache.org/repos/asf/uima/sandbox/uima-ducc/trunk@1590685 13f79535-47bb-0310-9956-ffa450edef68