Move TestQueryEngineMultiThreaded int test package engine and hook in TS_Engine

git-svn-id: https://svn.apache.org/repos/asf/jena/trunk@1449039 13f79535-47bb-0310-9956-ffa450edef68
Move TestQueryEngineMultiThreaded int test package engine and hook in TS_Engine

git-svn-id: https://svn.apache.org/repos/asf/jena/trunk@1449040 13f79535-47bb-0310-9956-ffa450edef68