test: fix all clippy lints in tests (#2573)

tokio/tests/macros_join.rs

@@ -1,3 +1,4 @@
+#![allow(clippy::blacklisted_name)]
 use tokio::sync::oneshot;
 use tokio_test::{assert_pending, assert_ready, task};
 

tokio/tests/macros_select.rs

@@ -1,3 +1,4 @@
+#![allow(clippy::blacklisted_name)]
 use tokio::sync::{mpsc, oneshot};
 use tokio::task;
 use tokio_test::{assert_ok, assert_pending, assert_ready};

tokio/tests/macros_try_join.rs

@@ -1,3 +1,4 @@
+#![allow(clippy::blacklisted_name)]
 use tokio::sync::oneshot;
 use tokio_test::{assert_pending, assert_ready, task};
 

tokio/tests/sync_mutex_owned.rs

@@ -36,7 +36,7 @@ fn straight_execution() {
 fn readiness() {
     let l = Arc::new(Mutex::new(100));
     let mut t1 = spawn(l.clone().lock_owned());
-    let mut t2 = spawn(l.clone().lock_owned());
+    let mut t2 = spawn(l.lock_owned());
 
     let g = assert_ready!(t1.poll());
 

tokio/tests/time_delay_queue.rs

@@ -1,3 +1,4 @@
+#![allow(clippy::blacklisted_name)]
 #![warn(rust_2018_idioms)]
 #![cfg(feature = "full")]