Avoid duplicate "/tokens" path in auth_url.

The "/tokens" path is explicitly appended to the OS_AUTH_URL
by the configure_tempest.sh tool, but this is also appended
internally by glance:

  https://github.com/openstack/glance/blob/master/glance/common/auth.py#L111

leading to a duplicated "/tokens/tokens" path.

Change-Id: I2ea49289f7e1976346eff220dc3d1664bdad4fb0
diff --git a/tools/configure_tempest.sh b/tools/configure_tempest.sh
index f6ef0d3..9b25b7e 100755
--- a/tools/configure_tempest.sh
+++ b/tools/configure_tempest.sh
@@ -133,7 +133,7 @@
 
 sed -e "
     /^api_key=/s|=.*\$|=$ADMIN_PASSWORD|;
-    /^auth_url=/s|=.*\$|=${OS_AUTH_URL%/}/tokens/|;
+    /^auth_url=/s|=.*\$|=${OS_AUTH_URL%/}/|;
     /^host=/s|=.*\$|=$HOST_IP|;
     /^image_ref=/s|=.*\$|=$IMAGE_UUID|;
     /^password=/s|=.*\$|=$ADMIN_PASSWORD|;