Method Name: deleteJob
Description: Deletes a monitoring job.
WSDL URL: https://api.durabledns.com/services/monitoring/job.php?wsdl
apiuser —— Value for authentication – Provided by DurableDNS on the Dashboard
apikey —— Value for authentication – Provided by DurableDNS on the Dashboard
job_id —— Unique numeric ID of job.
return —— 'Success' or error message