diskimage-builder : make mirror repos

Call the contrib script to make the infra mirror repo files.  I don't
want the functional tests calling this themselves -- in theory they
should run anywhere and this is OpenStack CI specific setup.

While we're here, remove the clone and install of dib-utils.  This
hasn't been doing anything since
Ic1e22ba498d2c368da7d72e2e2b70ff34324feb8 when we decided to retire
the project and fold it into diskimage-builder.  The related jobs
aren't actually testing anything.

Change-Id: I45b4b181369032155f8908ee11641d2327586e6f

jenkins/jobs/diskimage-builder.yaml

@@ -14,8 +14,7 @@
 
           /usr/zuul-env/bin/zuul-cloner --cache-dir /opt/git \
             git://git.openstack.org \
-            openstack/diskimage-builder \
-            openstack/dib-utils
+            openstack/diskimage-builder
       - shell: |
           #!/bin/bash -xe
           cd ~/openstack/diskimage-builder
@@ -33,12 +32,15 @@
 
           virtualenv -p {python} env
 
-          ./env/bin/pip install $(pwd)/openstack/dib-utils
           ./env/bin/pip install $(pwd)/openstack/diskimage-builder
 
           # TODO(pabelanger): Remove once we migrated to bindep
           ./openstack/diskimage-builder/tests/install_test_deps.sh
 
+          # This sets up some repo files pointing to the infra mirrors
+          # which are used during test runs
+          ./openstack/diskimage-builder/contrib/setup-gate-mirrors.sh
+
           # activate the virtualenv so that any tools run by dib run
           # using the python inside it
           set +u

zuul/layout.yaml

@@ -9152,14 +9152,10 @@ projects:
       - name: check-requirements
       - name: publish-to-pypi
     check:
-      - gate-dib-dsvm-functests-python2-ubuntu-trusty
-      - gate-dib-dsvm-functests-python2-centos-7
       - gate-dib-utils-tox-func-ubuntu-xenial
     check-tripleo:
       - gate-tripleo-ci-centos-7-ovb-ha-oooq
     gate:
-      - gate-dib-dsvm-functests-python2-ubuntu-trusty
-      - gate-dib-dsvm-functests-python2-centos-7
       - gate-dib-utils-tox-func-ubuntu-xenial
     post:
       - dib-utils-branch-tarball