LVAlert messages for labels do not have a self link
@deep.chatterjee found this one:
[2018-06-29 13:07:17,894: ERROR/ForkPoolWorker-1] gwcelery.tasks.lvalert.listen[5f526064-5919-425a-b17c-029b20cb5b72]: LVAlert message does not contain an API URL: {'labels': ['SKYMAP_READY'], 'alert_type': 'label', 'uid': 'S180629cb', 'file': '', 'description': 'LABEL: SKYMAP_READY added'}
@tanner.prestegard, would you please take a look?