FR-sync - Improve FRM reconciliation - do not wipe out device when it is not configured

Scenario:

• Inventory Config DS is empty (or not containing node for Device1)
• Inventory Operationa DS is not empty and containing node for Device1
• current implementation of the RECONCILIATION deletes all flows and groups (this is not wanted behavior)

It needs to work like this:

• if inventory Config DS contains node for Device1 it needs to compre flows and groups with operational data (all flows/groups are deleted when configured node has empty list of nodes/groups)
• if inventory Config DS does not contain node for Device1 - it will not be touched (no RPC call FlatBatch)