Add encrypted service account key for system tests (#488)
Add encrypted service account key for system tests (#488)


googleapis/cloud-trace-nodejs,matthewloring/cloud-trace-nodejs,googleapis/cloud-trace-nodejs,matthewloring/cloud-trace-nodejs,googleapis/cloud-trace-nodejs,keymetrics/vxx,keymetrics/trassingue,keymetrics/vxx,keymetrics/trassingue,googleapis/cloud-trace-nodejs,matthewloring/cloud-trace-nodejs