Cleanup specs.o.o, add infra-specs

Since projects have their specs named inconsistently, let's
use the same design and naming as
http://docs.openstack.org/developer/openstack-projects.html
That way we have one level of consistency accross pages.

Also add infra-specs repo.

Change-Id: I92ae044ba0ce31e5aa7857b01d748ad17cb8c055
Merge "Cleanup specs.o.o, add infra-specs"