Fix indexer test by waiting for threads to complete

Since the indexer is now multithreaded, we wait
until all threads complete before exiting the
test program.

Libs/DICOM/Core/Testing/Cpp/ctkDICOMIndexerTest1.cpp

@@ -54,5 +54,8 @@ int ctkDICOMIndexerTest1( int argc, char * argv [] )
   // make sure it doesn't crash
   indexer.refreshDatabase(database, QDir::tempPath());
 
+  // ensure all concurrent inserts are complete
+  indexer.waitForImportFinished();
+
   return EXIT_SUCCESS;
 }