Spike for getting a go task scheduler

http test commands

$ curl -X POST http://localhost:8080/addTask -H "Content-Type: application/json" -d '{"Spec": "* * * * *", "VolumeName": "Every minute task"}'

returns {"taskID":1}

$ curl -X POST http://localhost:8080/removeTask -H "Content-Type: application/json" -d '{"TaskID": 1}'

curl -X GET http://localhost:8080/debug/tasks

Mock gen:

mockgen -source=persistence/persistence.go -destination=mocks/persistence/mock_persistence.go -package=mock_persistence mockgen -source=cronjobs/cron.go -destination=mocks/cronjobs/mock_cron.go -package=mock_cronjobs