Add reviewday variables to static class

Add the reviewday variables from hiera to the
openstack_project::static class.

Change-Id: I33a24a572ba504d87de38fbe7ec0dc00bbfef6ee
Reviewed-on: https://review.openstack.org/24850
Reviewed-by: Anita Kuno <akuno@lavabit.com>
Approved: Jeremy Stanley <fungi@yuggoth.org>
Reviewed-by: Jeremy Stanley <fungi@yuggoth.org>
Tested-by: Jenkins