acloud create: If setup was skipped, tell the user to do it, nicely.

We can tell if the user needs a config file or host setup based on the
create action they specified so instead of raising an exception
somewhere and confusing them, point them to run acloud setup.

Bug: 110383583
Test: acloud create with no ~/.config/acloud/acloud.config
Change-Id: Id0aabbea821f9d9f6f5fc3c5d0ea277284e5bdd7
2 files changed