Fixed Nginx test.

tests/test_nginx_vhosts.py

@@ -22,7 +22,7 @@ if not os.path.exists(wowza_dir):
     print('Info: Wowza is not installed ("%s" does not exist).' % wowza_dir)
     wowza_dir = None
 else:
-    print('Info: Wowza is installed, /streaming/ will be tested on mediaserver vhosts.' % wowza_dir)
+    print('Info: Wowza is installed, /streaming/ will be tested on mediaserver vhosts.')
 
 # get enabled vhosts
 requests.packages.urllib3.disable_warnings()