Maintenance: old services are using outdated Docker REST API, or wrong

[sanderegg]

Most of 3rd party services that define a resource reservation do it by setting a label such as:

{"Resources" {"Reservations":{"NanoCPUs":123}}}

This is wrong and should be:

{"Resources" {"Reservation":{"NanoCPUs":123}}}

see https://docs.docker.com/engine/api/v1.41/#operation/ServiceCreate

Nevertheless we should also keep backward compatibility.

For info @pcrespov , @GitHK , @mguidon , @odeimaiz

[sanderegg]

actually this was a wrong assessment, and the Docker REST API has been corrected.
It's "Reservations"