IVGCVSW-4487 Remove boost::filesystem

 * Replace filesystem::path
 * Replace filesystem::exists
 * Replace filesystem::is_directory
 * Replace filesystem::directory_iterator
 * Replace filesystem::filesystem_error exception
 * Replace filesystem::temp_directory_path
 * Replace filesystem::unique path
 * Replace filesystem::ofstream with std::ofstream
 * Replace filesystem::remove
 * Replace filesystem::is_regular_file
 * Replace boost::optional with armnn::Optional in touched files
 * Remove some superfluous includes
 * Update build guides, GlobalConfig.cmake and CMakeLists.txt
 * Remove redundant armnnUtils::Filesystem::Remove function.
 * Remove redundant armnnUtils::Filesystem::GetFileSize function.

Temporarily adding back Boost::filesystem to enable Boost::dll.

Signed-off-by: Francis Murtagh <francis.murtagh@arm.com>
Signed-off-by: Colm Donelan <Colm.Donelan@arm.com>

Change-Id: Ifa46d4a0097d2612ddacd8e9736c0b36e365fb11
diff --git a/tests/InferenceTest.cpp b/tests/InferenceTest.cpp
index 0391a9a..b0d0b47 100644
--- a/tests/InferenceTest.cpp
+++ b/tests/InferenceTest.cpp
@@ -5,13 +5,12 @@
 #include "InferenceTest.hpp"
 
 #include <armnn/utility/Assert.hpp>
+#include <Filesystem.hpp>
 
 #include "../src/armnn/Profiling.hpp"
 #include <boost/numeric/conversion/cast.hpp>
-#include <boost/filesystem/path.hpp>
 #include <boost/format.hpp>
 #include <boost/program_options.hpp>
-#include <boost/filesystem/operations.hpp>
 
 #include <fstream>
 #include <iostream>
@@ -102,13 +101,13 @@
         dir += "/";
     }
 
-    if (!boost::filesystem::exists(dir))
+    if (!fs::exists(dir))
     {
         std::cerr << "Given directory " << dir << " does not exist" << std::endl;
         return false;
     }
 
-    if (!boost::filesystem::is_directory(dir))
+    if (!fs::is_directory(dir))
     {
         std::cerr << "Given directory [" << dir << "] is not a directory" << std::endl;
         return false;