Update ansible library location to envsitepackagesdir

We install zuul so that we can pick up library entries. The proper path
for this is envsitepackagesdir. Also, just list zuul in the requirements
so that we're not cloning remotely. tox-siblings will take care of it in
the gate for us, because we add zuul to required-projects in the
openstack-zuul-jobs-linters job.

This adds a setup.py and setup.cfg so that tox-siblings can do its
thing.

Depends-On: https://review.openstack.org/611607
Change-Id: I864308af3424a0b0505a252d0d5cf44277172fbf

setup.cfg

@@ -0,0 +1,15 @@
+[metadata]
+name = project-config
+summary = Infrastructure Configuration for the OpenStack Project
+description-file =
+    README.rst
+author = OpenStack Infrastructure Team
+author-email = openstack-infra@lists.openstack.org
+home-page = http://www.openstack.org/
+classifier =
+    Environment :: OpenStack
+    Intended Audience :: Information Technology
+    Intended Audience :: System Administrators
+    License :: OSI Approved :: Apache Software License
+    Operating System :: POSIX :: Linux
+    Programming Language :: Python

setup.py

@@ -0,0 +1,28 @@
+# 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.
+
+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'],
+    pbr=True)

tox.ini

@@ -11,7 +11,7 @@ passenv = http_proxy HTTP_PROXY https_proxy HTTPS_PROXY no_proxy NO_PROXY
 basepython = python3
 whitelist_externals = bash
 setenv =
-  ANSIBLE_LIBRARY= {envdir}/src/zuul/zuul/ansible/library
+  ANSIBLE_LIBRARY= {envsitepackagesdir}/zuul/ansible/library
   # NOTE(pabelanger): if you'd like to run tox -elinters locally,
   # you'll need to export ANSIBLE_ROLES_PATH pointing to the required
   # repos.
@@ -28,7 +28,7 @@ setenv =
 # python3.
 deps =
      # Zuul is required to supply the zuul ansible modules for ansible-lint
-     -egit+https://git.openstack.org/openstack-infra/zuul#egg=zuul
+     zuul
      # Unfortunately pip doesn't do actual dependency resolution, so
      # we need to manually ansible at the top level to the same as
      # zuul requirements.txt