mount: edit boot parameters warning condition (#523)

the CI failures are unrelated and shouldn't even be showing up ... I'm going to sort that out separately but that doesn't need to prevent this merge, all relevant CI tests passed

plugins/modules/mount.py

@@ -831,7 +831,7 @@ def main():
         # handle mount on boot.  To avoid mount option conflicts, if 'noauto'
         # specified in 'opts',  mount module will ignore 'boot'.
         opts = args['opts'].split(',')
-        if 'noauto' in opts:
+        if module.params['boot'] and 'noauto' in opts:
             args['warnings'].append("Ignore the 'boot' due to 'opts' contains 'noauto'.")
         elif not module.params['boot']:
             args['boot'] = 'no'