Update pypi metadata to reference -infra

Most of this was existing cookiecutter defaults used for OpenStack
projects. Additionally, we are adding the alpha tag since we are still
early in the release process.  Over the next few releases we'll bump
this up to beta then eventually stable.

Also, http://docs.openstack.org/infra/system-config/grafyaml.html
currently does not exist. I will be adding a follow-up patch for
system-config.

Change-Id: Idd601c3179cbec87441713f5317d51b0ebe134b1
Signed-off-by: Paul Belanger <pabelanger@redhat.com>

setup.cfg

@@ -3,15 +3,17 @@ name = grafyaml
 summary = Grafyaml takes simple descriptions of Grafana dashboards in YAML format, and uses them to configure grafana.
 description-file =
     README.rst
-author = OpenStack
-author-email = openstack-dev@lists.openstack.org
-home-page = http://www.openstack.org/
+author = OpenStack Infrastructure Team
+author-email = openstack-infra@lists.openstack.org
+home-page = http://docs.openstack.org/infra/system-config/grafyaml.html
 classifier =
-    Environment :: OpenStack
+    Development Status :: 3 - Alpha
+    Environment :: Console
+    Intended Audience :: Developers
     Intended Audience :: Information Technology
     Intended Audience :: System Administrators
     License :: OSI Approved :: Apache Software License
-    Operating System :: POSIX :: Linux
+    Operating System :: OS Independent
     Programming Language :: Python
     Programming Language :: Python :: 2
     Programming Language :: Python :: 2.7
@@ -19,6 +21,7 @@ classifier =
     Programming Language :: Python :: 3
     Programming Language :: Python :: 3.3
     Programming Language :: Python :: 3.4
+    Topic :: Utilities
 
 [files]
 packages =