Add missing license text

Author: timsaucer

datafusion/ffi/src/execution_plan.rs

@@ -212,7 +212,6 @@ fn pass_runtime_to_children(
     plan: &Arc<dyn ExecutionPlan>,
     runtime: &Handle,
 ) -> Result<Option<Arc<dyn ExecutionPlan>>> {
-    println!("checking plan {:?}", plan.name());
     let mut updated_children = false;
     let plan_is_foreign = plan.as_any().is::<ForeignExecutionPlan>();
 

datafusion/ffi/tests/ffi_execution_plan.rs

@@ -1,3 +1,20 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 #[cfg(feature = "integration-tests")]
 mod tests {
     use arrow::datatypes::Field;