Bug 1033334

Description of problem:
I'd love to see us streamline registration with an on premise server. If I point subscription manager to SAM, we know where the rpm we need is located and how to access it, can't we take a minute to install it, drop the cert in place, let it edit the relevant conf files, and then try to register with SAM? Instead of failing and making them manually pull over the cert, install it, and re-launch subman GUI or re-run registration through the CLI (assuming they don't have to look up how to get the cert/why it won't connect)?

I think all we have to do is:
* recognize that they're trying to register with something they don't have a certificate for yet
* pull this over: http://sam_server_hostname/pub/candlepin-cert-consumer.noarch.rpm
* install the rpm
* refresh the data the reg dialog is looking at, so it matches the updated conf file
* and continue with the registration, which should now work, instead of fail like it would currently (without manually installing the rpm)

Would that be possible?

Still seems awkward to me that we don't have any support for doing this through the GUI or CLI without knowing that you have to do it and how to do it. It's probably fair that this will be automated in many environments once they hit sufficient scale to want to use those products, but it doesn't feel like we should completely depend on them doing so to have a decent experience.

If they're trying to register through the CLI, it would be even easier wouldn't it? We just have to catch that case, run the command from our docs (# rpm -ivh http://sam.example.com/pub/candlepin-cert-consumer.noarch.rpm) and then continue registration/or kick it off again with the same options they ran it with the first time (could we save the switches or pull from bash history or something?).