Fix: session should not be forwarded for devices in the hub

[afathonih]

1. Fix regression bug when introducing nodeId in devices. Session for devices in the bug was forwarded to the hub. Forwarding should not happen for devices in the hub.
2. Added test cases to cover the use case of forwarding. Introduce new pluginArg to help with testing: preventSessionForwarding
3. Added clean-up step to remove devices on the node where nodeId is not the same.
4. Sync removed device when nodeId change (when starting node).
5. Fix issue caused by node-persist (removing it from the equation)

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[afathonih]

@saikrishna321 @sudharsan-selvaraj anything else you want to change/test in this PR?