[UIMA-3694] fix up test case to be valid for produceAnalysisEngine calling, and add multi-threaded creation test

git-svn-id: https://svn.apache.org/repos/asf/uima/uimaj/trunk@1584693 13f79535-47bb-0310-9956-ffa450edef68
[UIMA-3694] add multi-threaded test

git-svn-id: https://svn.apache.org/repos/asf/uima/uimaj/trunk@1584694 13f79535-47bb-0310-9956-ffa450edef68
[UIMA-3694] support for multi-threaded tests

git-svn-id: https://svn.apache.org/repos/asf/uima/uimaj/trunk@1584695 13f79535-47bb-0310-9956-ffa450edef68