Acceptance criteria:

• Enterprise plan only.

• When deployments/next endpoint is called, check for the existence of update_control_map in the top-level deployments object.

  • If it doesn't exist or is empty, keep existing behavior, IOW return the same as today.

  • If it does exist, check for update_control_map parameter.

    • If unset or set to any other value than "true", fail the update for this device with "Device does not support Update Control. Need to create a deployment without Update Control for this device.". Return 204 to device.

    • If set to "true", return the update_control_map JSON object in the client response.

• It is only needed to support the update_control_map parameter in POST requests.

• Unit tests.

• Feature branch: feature-update_control_maps