fix(do-not-merge): ignore failures loading config (#2944)
fix(do-not-merge): ignore failures loading config (#2944)

For do-not-merge it's safe to default to defaultConfig if we fail to load
remote configuration

Fixes #2739
googleapis/repo-automation-bots,googleapis/repo-automation-bots,googleapis/repo-automation-bots,googleapis/repo-automation-bots,googleapis/repo-automation-bots