Cleanup benchmarks (#197)

* Require test argument

* Increase tx timeout and channel limits

* Add default arguments for tests

* Fix tests

* Fix tests

* Cleanup benchmarks

crates/node/src/node_implementations/substrate.rs

@@ -578,6 +578,7 @@ impl EthereumNode for SubstrateNode {
                             proof_size: block_proof_size,
                             max_proof_size,
                         }),
+                        tx_counts: Default::default(),
                     })
                 }
             });