Generate `about_resource_path` for validation check

[chinyeungli]

Sometimes, the input may not have the about_resource_path value and, therefore, the code cannot validate the existence of that file during the validation. The current code will generate the about_resource_path during the process and then do the existence check after the dump.

Perhaps the tool should generate the the about_resource_path value (if missing) in the load_inventory and then do the validation afterward instead of checking in the dumps.

[chinyeungli]

Closing this as I think the current implementation works fine.
The load_inventory should ONLY do the loading, not modifying anything.
The current implementation update the about_resource_path (only if this field is not provided) during the generate process, not in the dumps.