Fix the old or invalid doc links

The urls in docs are old or invalid.
Replace them with the right ones for the docs according to
the official OpenStack websites.

Change-Id: I259702f5771e975fe24f7e97a450f342d8ad2beb
diff --git a/setup.cfg b/setup.cfg
index b0b7405..a54cc6c 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -5,7 +5,7 @@
     README.rst
 author = OpenStack
 author-email = openstack-dev@lists.openstack.org
-home-page = http://www.openstack.org/
+home-page = https://git.openstack.org/cgit/openstack/neutron-tempest-plugin
 classifier =
     Environment :: OpenStack
     Intended Audience :: Information Technology