Fix memory leaks

After adding sanitizers, memory leaks were detected when running GridGeneratorTests. This merge fixes them.

There are some leaks remaining in VirtualFluids_GPUTests . See #94 (closed).

This merge includes a temporary fix for #85.

CMake/cmake_config_files/ARAGORNUBUNTU.config.cmake

@@ -14,4 +14,9 @@ list(APPEND USER_APPS
     "${GPU_APP}DrivenCavityMultiGPU"
     "${GPU_APP}SphereScaling"
     # "${GPU_APP}MusselOyster"
-    )
\ No newline at end of file
+    )
+
+# add_compile_options(-fsanitize=address)
+# add_link_options(-fsanitize=address)
+# add_compile_options(-fsanitize=undefined)
+# add_link_options(-fsanitize=undefined)