Fix folder names in client and test (#4360)

* client/rpc/api -> client/rpc-api

* client/util/wasm-builder-runner -> utils/wasm-builder-runner

* client/grafana-data-source -> utils/grafana-data-source

* test/utils -> test-utils

* fix moved path

* Update Cargo.lock

* Update Cargo.lock

substrate/utils/grafana-data-source/test/src/main.rs

@@ -0,0 +1,44 @@
+// Copyright 2019 Parity Technologies (UK) Ltd.
+// This file is part of Substrate.
+
+// Substrate is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Substrate is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Substrate.  If not, see <http://www.gnu.org/licenses/>.
+
+use grafana_data_source::{run_server, record_metrics};
+use std::time::Duration;
+use rand::Rng;
+use futures::{future::join, executor};
+
+async fn randomness() {
+	loop {
+		futures_timer::Delay::new(Duration::from_secs(1)).await;
+
+		let random = rand::thread_rng().gen_range(0.0, 1000.0);
+
+		let result = record_metrics!(
+			"random data" => random,
+			"random^2" => random * random,
+		);
+
+		if let Err(error) = result {
+			eprintln!("{}", error);
+		}
+	}
+}
+
+fn main() {
+	executor::block_on(join(
+		run_server("127.0.0.1:9955".parse().unwrap()),
+		randomness()
+	)).0.unwrap();
+}