Better Errors for users when Metrics are submitted in too quick succession or out of order

Cloud Monitoring can throttle Metric timeseries that are sent in too quick sucession, or out of order.

This client can take two approaches to the problem:

1. Avoid sending the data through detection and issuing a clear error message for users.
2. Handling the failure to write the TimeSeries gracefully and issuing a clear error message for users.

Current approach is to try #1, but we're lacking refinement in the error messages for users to diagnose and fix the issue.