Runs a mocha spec in a child process, returning a json object that complies
with the response body required by GCM Synthetics' API contract.
When cloud monitoring receives data from this function, it will convert
it to metrics, logs, and traces.
Results of the mocha test run, complying with the Synthetics SDK API.
Errors within this function reolve, with further information within the
returned object's synthetic_generic_result_v1.
Runs a mocha spec in a child process, returning a json object that complies with the response body required by GCM Synthetics' API contract. When cloud monitoring receives data from this function, it will convert it to metrics, logs, and traces.