HADOOP-13121. rename sub-project shellprofiles to match the rest of Hadoop

hadoop-hdfs-project/hadoop-hdfs/src/main/shellprofile.d/hdfs.sh → hadoop-hdfs-project/hadoop-hdfs/src/main/shellprofile.d/hadoop-hdfs.sh

@@ -1,4 +1,4 @@
-
+#!/usr/bin/env bash
 # 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.

hadoop-mapreduce-project/shellprofile.d/mapreduce.sh → hadoop-mapreduce-project/shellprofile.d/hadoop-mapreduce.sh

@@ -1,4 +1,4 @@
-
+#!/usr/bin/env bash
 # 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.

hadoop-yarn-project/hadoop-yarn/shellprofile.d/yarn.sh → hadoop-yarn-project/hadoop-yarn/shellprofile.d/hadoop-yarn.sh

@@ -1,4 +1,4 @@
-
+#!/usr/bin/env bash
 # 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.