fix: enable self signed jwt for grpc#114

gcf-merge-on-green[bot] merged 2 commits intomastergoogleapis/python-analytics-data:masterfrom

owl-bot-3f1a7e95-f944-45ae-b781-a9f29ee40e99googleapis/python-analytics-data:owl-bot-3f1a7e95-f944-45ae-b781-a9f29ee40e99Copy head branch name to clipboard