credentials: return Unavailable instead of Internal for per-RPC creds errors#1776

Merged

dfawley merged 1 commit intogrpc:masterfrom jeanbza:issue_1704

Jan 3, 2018

+8-3

Commits on Jan 3, 2018

Per issue grpc#1704 , return appropriate errors from PerRPCCredential errors
jeanbza
committed