Add python packaging files (setup.py and setup.cfg)

This will enable us to use tox to check this.

setup.cfg

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+[metadata]
+name = tripleo-ipsec
+summary = Ansible role for managing TripleO's IPSEC tunnels
+description-file =
+    README.md
+author = Juan Antonio Osorio Robles
+author-email = jaosorior@redhat.com
+home-page = https://github.com/JAORMX/tripleo-ipsec
+classifier =
+    Intended Audience :: Developers
+    Intended Audience :: System Administrators
+    License :: OSI Approved :: GNU General Public License v3 (GPLv3)
+    Operating System :: POSIX :: Linux
+
+[pbr]
+warnerrors = True
+
+[wheel]
+universal = 1

setup.py

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+# Copyright (c) 2013 Hewlett-Packard Development Company, L.P.
+#
+# 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.
+
+# THIS FILE IS MANAGED BY THE GLOBAL REQUIREMENTS REPO - DO NOT EDIT
+import setuptools
+
+# In python < 2.7.4, a lazy loading of package `pbr` will break
+# setuptools if some other modules registered functions in `atexit`.
+# solution from: http://bugs.python.org/issue15881#msg170215
+try:
+    import multiprocessing  # noqa
+except ImportError:
+    pass
+
+setuptools.setup(
+    setup_requires=['pbr>=2.0.0'],
+    pbr=True)