Only skip openstack tarballs in requirements check
Only skip openstack tarballs in requirements check

We really only want to allow openstack tarball requirements to be added
without checking, not just any tarball.

Change-Id: I0ce458c95dc2fba07100b921d094ff174ed7da57
Reviewed-on: https://review.openstack.org/36070
Reviewed-by: James E. Blair <e81a02a9d6405977f63a769d9f6ec8ed9d924325@inaugust.com>
Reviewed-by: Khai Do <3d37b62bea58a43f6244a935240c4d26cffc90fb@gmail.com>
Approved: Clark Boylan <635fc31d01fa593720982fa0568e87170cedbe2c@gmail.com>
Reviewed-by: Clark Boylan <635fc31d01fa593720982fa0568e87170cedbe2c@gmail.com>
Tested-by: Jenkins

open-switch/infra_puppet-jenkins,open-switch/infra_puppet-jenkins