Run node CI as non-root user (#498)
Run node CI as non-root user (#498)

* Run node CI as non-root user

CircleCI docker containers have problems unpacking GRPC pre-built binary for Node.js if run as root. That's reported as a separate issue. For now, let's run Node.js tests as non-root user which will save literally tens of minutes for each CI run.

* fixing working directory for node jobs

pongad/api-client-staging,garrettjonesgoogle/api-client-staging,garrettjonesgoogle/api-client-staging,pongad/api-client-staging,googleapis/api-client-staging,googleapis/api-client-staging,pongad/api-client-staging,garrettjonesgoogle/api-client-staging,googleapis/api-client-staging,pongad/api-client-staging,googleapis/api-client-staging,googleapis/api-client-staging,pongad/api-client-staging,garrettjonesgoogle/api-client-staging,garrettjonesgoogle/api-client-staging