The scenarios in which the credential is used are:
1) Calls to Nomulus GAE HTTP endpoints.
2) Calls to Google APIs within the tool.
3) Calls to GAE APIs within the tool.
From now on the tool should not depend on ADCs created from gcloud any more (expect for beam pipeline deployments which need some more investigation as the dependency on ADC is not apparent). Using the nomulus tool requires running "nomulus login" first, but only once.
-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=224165735
