Add start and end time to run.log for custodian. Easier to check run times from command line.
Add start and end time to run.log for custodian. Easier to check run times from
command line.

specter119/custodian,materialsproject/custodian,specter119/custodian,alberthxf/custodian,materialsproject/custodian,materialsproject/custodian,specter119/custodian,xhqu1981/custodian,davidwaroquiers/custodian