* refactor grid topology to expose more info to subsystems * fix grid_topology test * fix overseer test * Update node/network/protocol/src/grid_topology.rs Co-authored-by: Vsevolod Stakhov <vsevolod.stakhov@parity.io> * Update node/network/protocol/src/grid_topology.rs Co-authored-by: Andronik <write@reusable.software> * Update node/network/protocol/src/grid_topology.rs Co-authored-by: Andronik <write@reusable.software> * fix bug in populating topology * fmt Co-authored-by: Vsevolod Stakhov <vsevolod.stakhov@parity.io> Co-authored-by: Andronik <write@reusable.software>