HDFS-16465. Remove redundant strings.h inclusions (#4279)

* Remove redundant strings.h inclusions

* strings.h was included in a bunch of
  C/C++ files and were redundant.
* Also, strings.h is not available on
  Windows and thus isn't cross-platform
  compatible.

* Build for all platforms in CI

* Revert "Build for all platforms in CI"

This reverts commit 2650f047bd6791a5908cfbe50cc8e70d42c512cb.

* Debug failure on Centos 8

* Skipping pipeline run on
  Centos 7 to debug the
  failure on Centos 8.

* Revert "Debug failure on Centos 8"

This reverts commit e365e34d6fab9df88f4df622910ddb28a8c8796f.

hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/fuse-dfs/fuse_dfs.h

@@ -25,7 +25,6 @@
 #include <string.h>
 #include <errno.h>
 #include <assert.h>
-#include <strings.h>
 #include <syslog.h>
 
 #include <fuse.h>

hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/fuse-dfs/fuse_trash.c

@@ -21,7 +21,6 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <strings.h>
 
 #include "fuse_context_handle.h"
 #include "fuse_dfs.h"

hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfspp/lib/common/configuration.cc

@@ -35,7 +35,6 @@
 #include "hdfspp/uri.h"
 #include "x-platform/syscall.h"
 
-#include <strings.h>
 #include <sstream>
 #include <map>
 #include <rapidxml/rapidxml.hpp>

hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfspp/lib/common/configuration_loader.cc

@@ -21,7 +21,6 @@
 #include "x-platform/syscall.h"
 
 #include <fstream>
-#include <strings.h>
 #include <sstream>
 #include <map>
 #include <sys/stat.h>