* modules/systemd: fix logic: allow scope to default to 'system'
Fix logic introduced in 7ea909418e: if 'scope' param is not specified,
it defaults to system, but the value of module.params['scope'] is None,
not 'system' - so allow for that.
* modules/systemd: fix logic: disabled means disabled
Fix logic determining whether a service with both systemd and initd files is enabled or disabled.
In situations where systemd thinks service is disabled, but rc.d symlinks mark it as enabled,
this module wrongly assumes the service is enabled.
Fix this logic: disabled means disabled
Only when the output from does NOT include disabled, consider the status of rc.d symlinks.
This essentially replicates the fixes done to the systemd handling in the "service" module in 3c89a21e0cFixes#22303Fixes#44409