Update scheduler

[Meemog]

Update the scheduler to be able to support multiple testers for multiple HPCs

[Meemog]

Visual rota that shows at least a week in advance

[Meemog]

json schema for schedule

{
    "week-starting": "dd-mm-yyyy",
    "schedule": {
        "mon": {
            "cluster": "person"
        },
        "tue": {
            "cluster": "person"
        },
        "wed": {
            "cluster": "person"
        },
        "thu": {
            "cluster": "person"
        },
        "fri": {
            "cluster": "person"
        }
    }
}