added WIN32_LEAN_AND_MEAN flag to test binary for windows builds

Author: ihsandemir

hazelcast/test/src/CMakeLists.txt

@@ -10,6 +10,12 @@ target_compile_definitions(
     PRIVATE HAZELCAST_VERSION="${PROJECT_VERSION}"
 )
 
+# windows-specific compile flags
+if (WIN32)
+    # speeds the build process
+    target_compile_definitions(client_test PRIVATE WIN32_LEAN_AND_MEAN)
+endif ()
+
 if (MSVC)
     target_compile_options(client_test PRIVATE /bigobj)
 endif()