service_facts: Use LC_ALL/LANG=C to run commands (#44474)

This allows to parse the output when the user's locale changes the
commands' output. For example chkconfig uses 'Ein' and 'Aus' instead of
'on' and 'off' when using LANG=de_DE.UTF-8 breaking the service
detection on RHEL 6.

lib/ansible/modules/system/service_facts.py

@@ -202,6 +202,7 @@ class SystemctlScanService(BaseService):
 
 def main():
     module = AnsibleModule(argument_spec=dict(), supports_check_mode=True)
+    module.run_command_environ_update = dict(LANG="C", LC_ALL="C")
     service_modules = (ServiceScanService, SystemctlScanService)
     all_services = {}
     incomplete_warning = False