Get all jobs associated with the given runner_id - runner_id - String, unique identifier for runner - callback - f(err, jobs). `jobs` is an array of job's UUIDs. Note `jobs` will be an array, even when empty.
function getRunnerJobs(runner_id, callback) {
            var wf_runner_jobs = Object.keys(jobs).filter(function (uuid) {
                    return jobs[uuid].runner_id === runner_id;
                });

            return callback(null, wf_runner_jobs);
        }