Rewrite the network TestNet (#3016)

* Add a memory-only option for the network

* Tests cleanup

* Make grandpa/aura/babe compile

* Aura and Babe tests now passing

* More work on tests rewrite

* Attempt to fix grandpa

* Make more grandpa tests pass

* More grandpa tests work

* Work on sync tests

* More work

* light_peer_imports_header_from_announce passes

* can_sync_small_non_best_forks passes

* syncing_node_not_major_syncing_when_disconnected passes

* blocks_are_not_announced_by_light_nodes passing

* All sync tests passing 🎉

* Some TestNet cleanup

* Work on grandpa tests

* More grandpa work

* GrandPa work

* Add check about block_import

* Remove the temporarily added Sync

* Fix network tests warnings

* voter_persists_its_votes passes

* Fix imports in network tests

* Fix service tests

* Call on_block_imported 🤷

* Add shortcut

* Finish using shortcut

substrate/core/cli/src/lib.rs

@@ -32,7 +32,7 @@ use service::{
 };
 use network::{
 	self, multiaddr::Protocol,
-	config::{NetworkConfiguration, NonReservedPeerMode, NodeKeyConfig},
+	config::{NetworkConfiguration, TransportConfig, NonReservedPeerMode, NodeKeyConfig},
 	build_multiaddr,
 };
 use primitives::H256;
@@ -354,7 +354,10 @@ fn fill_network_configuration(
 	config.in_peers = cli.in_peers;
 	config.out_peers = cli.out_peers;
 
-	config.enable_mdns = !is_dev && !cli.no_mdns;
+	config.transport = TransportConfig::Normal {
+		enable_mdns: !is_dev && !cli.no_mdns,
+		wasm_external_transport: None,
+	};
 
 	Ok(())
 }