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/client/rpc-api/src/system/error.rs

@@ -0,0 +1,48 @@
+// Copyright 2017-2019 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/>.
+
+//! System RPC module errors.
+
+use crate::system::helpers::Health;
+use jsonrpc_core as rpc;
+
+/// System RPC Result type.
+pub type Result<T> = std::result::Result<T, Error>;
+
+/// System RPC errors.
+#[derive(Debug, derive_more::Display, derive_more::From)]
+pub enum Error {
+	/// Provided block range couldn't be resolved to a list of blocks.
+	#[display(fmt = "Node is not fully functional: {}", _0)]
+	NotHealthy(Health),
+}
+
+impl std::error::Error for Error {}
+
+/// Base code for all system errors.
+const BASE_ERROR: i64 = 2000;
+
+impl From<Error> for rpc::Error {
+	fn from(e: Error) -> Self {
+		match e {
+			Error::NotHealthy(ref h) => rpc::Error {
+				code: rpc::ErrorCode::ServerError(BASE_ERROR + 1),
+				message: format!("{}", e),
+				data: serde_json::to_value(h).ok(),
+			},
+		}
+	}
+}