Switch ansible-functional job zuul-git-prep

Since we only have a single module right now, we don't need to full
ability to zuul-clone.  We are also running into a 127 char shebang
limit with execve so this will reduce our directory name.

Change-Id: I024f414ddae85621a861b21d284ea1e417c4438d
Signed-off-by: Paul Belanger <pabelanger@redhat.com>

jenkins/jobs/ansible-role-jobs.yaml

@@ -18,18 +18,9 @@
     node: 'devstack-{ostype}'
 
     builders:
-      - zuul-clone:
+      - zuul-git-prep
-          project: $ZUUL_PROJECT
+      - tox:
-      # NOTE(pabelanger): We should be using the tox builder for this, however I
+          envlist: ansible-functional
-      # cannot see a better way of adding cd $ZUUL_PROJECT without exposing a
-      # new variable to the tox builder.
-      - shell: |
-          #!/bin/bash -xe
-          cd $ZUUL_PROJECT
-          /usr/local/jenkins/slave_scripts/run-tox.sh ansible-functional
-
-    publishers:
-      - zuul-swift-upload-console-log
 
 - job-group:
     name: 'ansible-lint-jobs'