Use sys_platform instead of platform_system
Use sys_platform instead of platform_system

This is more compatible as a marker and so will break fewer people.

Signed-off-by: Pierre-Louis Bonicoli <7a7613ec9cdf8183c029137b52ab44c195e3ab05@libregerbil.fr>

metacloud/molecule,metacloud/molecule,metacloud/molecule