fix: enable self signed jwt for grpc#88

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

owl-bot-aa1ee78a-27e9-46dd-a29f-e5a030e787a9googleapis/python-memcache:owl-bot-aa1ee78a-27e9-46dd-a29f-e5a030e787a9Copy head branch name to clipboard