Add optional comment when shutting down a node-owned server, and application, or message flow

During the normal course of operating a large number of applications, deployed to node owned servers, it is sometimes necessary to temporarily stop a server, application, or message flow. This might be to allow for maintenance of a backend system, or to resolve a issue causing failures, or any number of reasons.   The ask is to be able to optionally add a comment in the shutdown request that would set as a property of that resource.  When the UI displays the resource tile, for stopped resources, the comment would be displayed on the tile.  (Obviously this would likely be truncated, but the full comment would be available to view in the properties settings.)   The comment should also be included in any log messages generated by the shutdown. 

The ability to add a comment should be included as part of the UI (likely on the confirmation dialog), as an option in the REST API, and as a parameter on any relevant command line commands. 

The benefits of the enhancement would be:

• to provide information for audit purposes, 
• be able to communicate to other team members that might see the stopped resource and attempt to start it,
• as a reminder as to why the resource was stopped in the first place. 

Other things to consider if this is implements:

• Provide a means to make this mandatory either at the node or server level.  This would allow us to require a comment in production, but not in non-production.  
• Also log the user id that requested the shut down and save as a property.  This should be done even if a comment is not provided.