Add tty password input (#2503)

* Add tty password input

* Move password from core/service to core/cli

* Fix test build error

* Password should be entered only once if it's for decoding

* Update Cargo.lock from rebuild

substrate/core/service/test/src/lib.rs

@@ -127,6 +127,7 @@ fn node_config<F: ServiceFactory> (
 		offchain_worker: false,
 		force_authoring: false,
 		disable_grandpa: false,
+		password: "".to_string(),
 	}
 }