Add tripleo-undercloud job

TripleO uses ironic + networking-baremetal in undercloud while it does
not use ironic in overcloud. This change adds tripleo-undercloud so
that code specific to networking-baremetal is tested.

Change-Id: Ie8e668e4660228d0aa9798f894ffa6a7826850ea

.zuul.yaml

@@ -4,6 +4,7 @@
       - puppet-openstack-module-unit-jobs
       - puppet-openstack-integration-jobs-all
       - puppet-openstack-litmus-jobs
+      - tripleo-puppet-undercloud
       - release-notes-jobs-python3
     check:
       jobs:
@@ -18,9 +19,14 @@
     description: |
       TripleO standalone Job running Neutron specific Tempest tests.
     vars:
-      build_container_images: true
+      consumer_job: true
+      build_container_images: false
+      remove_tags:
+        - build
       featureset_override:
         run_tempest: false
         tempest_test_whitelist:
           - 'tempest.scenario.test_network_basic_ops.TestNetworkBasicOps.test_network_basic_ops'
         use_os_tempest: true
+    dependencies:
+      - tripleo-puppet-ci-centos-8-content-provider