UIMA-4066 removed synchronization. Each thread has its own PostMethod instance. Added support for virtual nodes

git-svn-id: https://svn.apache.org/repos/asf/uima/sandbox/uima-ducc/trunk@1645665 13f79535-47bb-0310-9956-ffa450edef68
UIMA-4069 DUCC Job Driver (JD) system classpath

Preemption works!

git-svn-id: https://svn.apache.org/repos/asf/uima/sandbox/uima-ducc/trunk@1645682 13f79535-47bb-0310-9956-ffa450edef68
UIMA-4069 DUCC Job Driver (JD) system classpath

Preemption works!

git-svn-id: https://svn.apache.org/repos/asf/uima/sandbox/uima-ducc/trunk@1645688 13f79535-47bb-0310-9956-ffa450edef68