Make smoke tests parallel

Last step in making smoke tests parallel by default.

Change-Id: Ibc80407f4cb86b2588c7309af4b427f67767c0aa
diff --git a/tox.ini b/tox.ini
index 268f7e9..9356dd7 100644
--- a/tox.ini
+++ b/tox.ini
@@ -77,11 +77,8 @@
 
 [testenv:smoke]
 sitepackages = True
-# This is still serial because neutron doesn't work with parallel. See:
-# https://bugs.launchpad.net/tempest/+bug/1216076 so the neutron smoke
-# job would fail if we moved it to parallel.
 commands =
-   sh tools/pretty_tox_serial.sh '(?!.*\[.*\bslow\b.*\])((smoke)|(^tempest\.scenario)) {posargs}'
+   sh tools/pretty_tox.sh '(?!.*\[.*\bslow\b.*\])((smoke)|(^tempest\.scenario)) {posargs}'
 
 [testenv:smoke-serial]
 sitepackages = True