Refactor command running around auth exceptions
Refactor command running around auth exceptions

Refactor command and component code in RegistryCli so that we can handle a
LoginRequiredException from whereever we are likely to ever get one.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=149329171

google/nomulus,google/nomulus,google/nomulus,google/nomulus,google/nomulus,google/nomulus