fix(api): Reset startTime when session.refresh is called (#1576)
fix(api): Reset startTime when session.refresh is called (#1576)

Addresses API portion of #1270
OpenTrons/opentrons-api,OpenTrons/opentrons-api,OpenTrons/opentrons-api,OpenTrons/opentrons-api,OpenTrons/opentrons_sdk,OpenTrons/opentrons-api,Opentrons/labware