Suppress missing docs clippy check in test code

Author: findepi

datafusion/core/src/physical_optimizer/test_utils.rs

@@ -17,6 +17,8 @@
 
 //! Collection of testing utility functions that are leveraged by the query optimizer rules
 
+#![allow(missing_docs)]
+
 use std::any::Any;
 use std::fmt::Formatter;
 use std::sync::Arc;

datafusion/core/src/test/mod.rs

@@ -17,6 +17,8 @@
 
 //! Common unit test utility methods
 
+#![allow(missing_docs)]
+
 use std::any::Any;
 use std::fs::File;
 use std::io::prelude::*;