fix base_url in auth.py

base_url lost a '/' after api version if noversion_path is not None.
this patch set fix the problem

Closes-Bug: #1277792

Change-Id: Id20796e2c00a4722ce78e9e3f7626f0a56317f43
diff --git a/tempest/auth.py b/tempest/auth.py
index 8d826cf..080e3e8 100644
--- a/tempest/auth.py
+++ b/tempest/auth.py
@@ -299,7 +299,7 @@
             path = "/" + filters['api_version']
             noversion_path = "/".join(parts.path.split("/")[2:])
             if noversion_path != "":
-                path += noversion_path
+                path += "/" + noversion_path
             _base_url = _base_url.replace(parts.path, path)
         if filters.get('skip_path', None) is not None:
             _base_url = _base_url.replace(parts.path, "/")