THRIFT-4106: fix errors concurrency_test was identifying
Client: C++

This closes #1343
diff --git a/lib/cpp/test/concurrency/ThreadManagerTests.h b/lib/cpp/test/concurrency/ThreadManagerTests.h
index c07a21b..9ecd6ba 100644
--- a/lib/cpp/test/concurrency/ThreadManagerTests.h
+++ b/lib/cpp/test/concurrency/ThreadManagerTests.h
@@ -109,7 +109,7 @@
     shared_ptr<ThreadManager> threadManager = ThreadManager::newSimpleThreadManager(workerCount);
 
     shared_ptr<PlatformThreadFactory> threadFactory
-        = shared_ptr<PlatformThreadFactory>(new PlatformThreadFactory());
+        = shared_ptr<PlatformThreadFactory>(new PlatformThreadFactory(false));
 
 #if !USE_BOOST_THREAD && !USE_STD_THREAD
     threadFactory->setPriority(PosixThreadFactory::HIGHEST);