[IoT] add iot device update command and resolve #1372

[xscript]

1. Add iot device update command.
2. Update device management REST API version to 2016-11-14.
3. Support --ids parameter to resolve [IoT] Support --ids parameter where applicable. #1372 .
4. Add more examples to command help documents.

Help message for new command is shown as below.

>az iot device update -h

Command
    az iot device update: Update metadata of a device in an IoT Hub.

Arguments
    --device-id -d [Required]: Device Id.
    --hub-name     [Required]: IoT Hub name.
    --resource-group -g      : Name of resource group.

Generic Update Arguments
    --add                    : Add an object to a list of objects by specifying a path and key value
                               pairs.  Example: --add property.listProperty <key=value, string or
                               JSON string>.
    --remove                 : Remove a property or an element from a list.  Example: --remove
                               property.list <indexToRemove> OR --remove propertyToRemove.
    --set                    : Update an object by specifying a property path and value to set.
                               Example: --set property1.property2=<value>.

Examples
    Disable a device.
        az iot device update --hub-name my-iot-hub --device-id my-device --set status=disabled

[mention-bot]

@xscript, thanks for your PR! By analyzing the history of the files in this pull request, we identified @tjprescott and @derekbekoe to be potential reviewers.

[tjprescott]

I take it the recent PR fixed the issue you had with the default name in the IDs parameter. This LGTM.