API docs: adjust API according to changes in artifact format
API docs: adjust API according to changes in artifact format

Issues: MEN-1022
changelog: none

Signed-off-by: Krzysztof Jaskiewicz <e32efa5aba9750434d7d140e652a05101fef01ed@gmail.com>

pasinskim/deployments,pasinskim/deployments,pasinskim/deployments,pasinskim/deployments