machinectl: include the success command (#5287) (#5312)

Combines the success command when building the become command. This is
consistent with other become plugins.

(cherry picked from commit f3bcfa5a75)

Co-authored-by: Ben Brown <ben@demerara.io>

changelogs/fragments/5287-machinectl-become-success.yml

@@ -0,0 +1,2 @@
+minor_changes:
+  - machinectl become plugin - combine the success command when building the become command to be consistent with other become plugins (https://github.com/ansible-collections/community.general/pull/5287).

plugins/become/machinectl.py

@@ -117,7 +117,7 @@ class BecomeModule(BecomeBase):
 
         flags = self.get_option('become_flags')
         user = self.get_option('become_user')
-        return '%s -q shell %s %s@ %s' % (become, flags, user, cmd)
+        return '%s -q shell %s %s@ %s' % (become, flags, user, self._build_success_command(cmd, shell))
 
     def check_success(self, b_output):
         b_output = self.remove_ansi_codes(b_output)