fix muptiply tests in one run, update report generation
diff --git a/wally/start_vms.py b/wally/start_vms.py
index 3ab4383..c533162 100644
--- a/wally/start_vms.py
+++ b/wally/start_vms.py
@@ -5,7 +5,7 @@
 import logging
 import subprocess
 
-from concurrent.futures import ThreadPoolExecutor, wait
+from concurrent.futures import ThreadPoolExecutor
 
 from novaclient.exceptions import NotFound
 from novaclient.client import Client as n_client