esp restarted when it sees RESOURCE_EXHAUSTED from servicemanagement.googleapis.com

[atetubou]

with log like

ERROR:Fetching service config failed (status code 429, reason { ...

Can esp do exponential retry instead of restart?

We set monitoring for container restart in our cluster, and restart due to this is bit annoying.

[qiwzhang]

It is a reasonable request since there is a limited quota calling service management service.