Mockup connected test doubles and more

• Major: new 'stub' feature connects global interface and mockup loader via dynamically generated interface implementation. Wow !
• Added check_version_fits and assert_version methods
• Added 'create_from_sys_settings' method, takes default paras from tvarvc table (tr. stvarv)
• Added 'load_raw_x' method
• 'load_data' accepts data references as a target container
• Added ZMOCKUP_LOADER_SWSRC check for production env
• VBA script removed
• Unification of public utility methods, in particular table filtering