Add pbr build configuration

Required for an RPM package builds with the contrib/ansible-kubespray.spec

Signed-off-by: Bogdan Dobrelya <bogdando@mail.ru>

requirements.txt

+pbr>=1.6
 ansible>=2.3.0
 netaddr
 jinja2>=2.9.6

setup.cfg

+[metadata]
+name = ansible-kubespray
+summary = Ansible modules for installing Kubernetes
+description-file =
+    README.md
+author = Kubespray
+author-email = smainklh@gmail.com
+home-page = https://github.com/kubernetes-incubator/kubespray
+classifier =
+  License :: OSI Approved :: Apache Software License
+  Development Status :: 4 - Beta
+  Intended Audience :: Developers
+  Intended Audience :: System Administrators
+  Intended Audience :: Information Technology
+  Topic :: Utilities
+
+[global]
+setup-hooks =
+    pbr.hooks.setup_hook
+
+[files]
+data_files =
+    /usr/local/share/kubespray/playbooks/ =
+        cluster.yml
+        upgrade-cluster.yml
+        scale.yml
+        reset.yml
+        extra_playbooks/upgrade-only-k8s.yml
+    /etc/kubespray/inventory/ =
+        inventory/group_vars/all.yml
+        inventory/group_vars/k8s-cluster.yml
+    /etc/kubespray/ =
+        ansible.cfg
+    /usr/local/share/kubespray/roles = roles/*
+
+[wheel]
+universal = 1
+
+[pbr]
+skip_authors = True
+skip_changelog = True

setup.py

+#   Copyright 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.
+
+import setuptools
+
+setuptools.setup(
+    setup_requires=['pbr'],
+    pbr=True)