Prepare to test git-review

* .../files/jenkins_job_builder/config/projects.yaml: Switch the
python-jobs group in for the previous pep8 and tarball jobs, since
we want to start running pythonXX tests too.

* .../files/zuul/layout.yaml: Run voting gate-git-review-pythonXX
jobs. These are effectively no-op tests for the moment, but will be
shortly followed by actual integration tests already under review.

Change-Id: I8cd516eef55e25d200609f6de3f06d322df383c7

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

@@ -281,9 +281,7 @@
     node: precise
     tarball-site: tarballs.openstack.org
     jobs:
-      - gate-{name}-pep8
+      - python-jobs
-      - '{name}-branch-tarball'
-      - '{name}-tarball'
       - pypi-jobs
 
 

modules/openstack_project/files/zuul/layout.yaml

@@ -1787,8 +1787,14 @@ projects:
   - name: openstack-infra/git-review
     check:
       - gate-git-review-pep8
+      - gate-git-review-python26
+      - gate-git-review-python27
+      - gate-git-review-python33
     gate:
       - gate-git-review-pep8
+      - gate-git-review-python26
+      - gate-git-review-python27
+      - gate-git-review-python33
     post:
       - git-review-branch-tarball
     pre-release: