Refactor panoptes to accept workflow ids from --wms-monitor-arg

[fgypas]

Is your feature request related to a problem? Please describe.
Panoptes is getting a request from snakemake via the create_workflow endpoint and generates a unique id. Then this id is sent back to snakemake and is used to send messages from snakemake to panoptes. This means that there is no way at the moment to pass an id that the user selects when they trigger snakemake (this would help with restarting the pipeline in the future).

Describe the solution you'd like
Snakemake can send an id to panoptes via the --wms-monitor-arg. Something like this:
--wms-monitor-arg workflow_id=12345-67890
Panoptes will check if the id is already in the database and if it is it will stop the run. If not it will continue.