Fixed receipt serialization and RPC (#6555)

ethcore/src/miner/miner.rs

@@ -1022,7 +1022,7 @@ impl MinerService for Miner {
 							},
 							logs: receipt.logs.clone(),
 							log_bloom: receipt.log_bloom,
-							state_root: receipt.state_root,
+							outcome: receipt.outcome.clone(),
 						}
 					})
 			}