Run pecan py33-scaffolds jobs on py3k-precise nodes.

Also, update the regex in the zuul functions to match
`gate-pecan-tox-scaffolds-33`. This will make the jobs register with gearman so
that zuul can run them.

Change-Id: Ia7d2ff6fd39b7034061f46042e019217857bcbd4

modules/openstack_project/files/jenkins_job_builder/config/projects.yaml

@@ -2443,7 +2443,7 @@
           envlist: scaffolds-27
       - gate-{name}-tox-{envlist}:
           envlist: scaffolds-33
-          node: bare-precise
+          node: py3k-precise
       - gate-{name}-tox-{envlist}:
           envlist: wsme-stable
       - gate-{name}-tox-{envlist}:

modules/openstack_project/files/zuul/openstack_functions.py

@@ -90,7 +90,7 @@ def set_node_options(item, job, params, default):
     python26_re = r'^.*-py(thon)?26.*$'
     centos6_re = r'^.*-centos6.*$'
     f20_re = r'^.*-f20.*$'
-    python33_re = r'^.*-py(py|(thon)?33).*$'
+    python33_re = r'^.*-(pypy|py(thon)?33|33).*$'
     tripleo_re = r'^.*-tripleo.*$'
     devstack_re = r'^.*-dsvm.*$'
     # jobs run on the proposal worker