Do not use a the git repository group as URL for OpenStack Infra,
instead use the http://docs.openstack.org/infra/system-config/ which
is also used in governance repository as URL for Infra.
Change-Id: I5422048180edb66b08428ef8242a82ede3849487
Our official git master is at git.openstack.org, update places
that use github instead.
Remove contributors link, it's not available on git.openstack.org.
Fix capitalization of OpenStack.
Change-Id: I9a1b5ca6769d63eea84f31de2e7485af78799c3d