Add centos8 file for deps

Currently the centos8 jobs end up falling back to the rhel8 deps but the
redhat8-master doesn't have a compatible puppet version so it fails. We
should have a centos8 vars file

Change-Id: I62c977008ac48e07ab79a6106180f5385258742f

tripleo_ansible/roles/test_deps/vars/centos-8.yml

@@ -0,0 +1,24 @@
+---
+# Copyright 2019 Red Hat, Inc.
+# All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License. You may obtain
+# a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+
+
+test_deps_repo: https://trunk.rdoproject.org/centos8-master/current
+test_deps_selinux_packages:
+  - python3-libselinux
+test_deps_tripleo_packages:
+  - python3-tripleoclient
+  - python3-openstacksdk
+test_deps_tripleo_repos: current-tripleo