[CONTROLLER-2091] Improve JSON export

Relates — Thu, 18 Jan 2024 12:07:27 +0000

JsonExportActor is using toString() on NormalizedNode output. This is not really nice, as it relies on toString(), which is not a really stable contract.
Furthermore it makes the data structure a blob – hence the structure is not relfected in JSON.

Improve the export to explicitly emit a JSON structure – similar to what NormalizedNode.prettyTree().toString() does.

OpenDaylight JIRA

[CONTROLLER-2091] Improve JSON export