deis certs are user-scoped

[Cryptophobia]

From @JeanMertz on July 15, 2016 13:52

I've added a certificate using one user, with deis certs:add ..., then as a different user, I want to attach this certificate to an application's custom domain, but when doing deis certs:list, I don't see any certificates (and indeed, deis certs:attach does not work as expected).

both users have their perms set to admin.

Copied from original issue: deis/controller#885

[Cryptophobia]

From @helgi on July 26, 2016 23:31

Right now that is by design. Apps are the only ones that you can share. We're looking to improve on that in the future

[Cryptophobia]

From @robholland on December 8, 2016 9:47

We'd also like this, as things are wildcard certs are a real pain to use. Every dev needs to upload the same certificate prefixed with their initials or something so they can add the certificate to apps. Either admins should be able to see all certs (not sure about that) or you should be able to use permissions to share certs with other users of your choice, which I think is preferably as it's explicit and allows sharing on specific certificates.