Also they bypass the 'single stdout' restriction

##### ISSUE TYPE
- Bug Report

##### COMPONENT NAME
<!--- Write the short name of the module, plugin, task or feature below, use your best guess if unsure -->
collections

##### ANSIBLE VERSION
<!--- Paste verbatim output from "ansible --version" between quotes -->
```paste below
2.8, 2.9
```

##### CONFIGURATION
<!--- Paste verbatim output from "ansible-config dump --only-changed" between quotes -->
```paste below

```

##### OS / ENVIRONMENT
<!--- Provide all relevant information below, e.g. target OS versions, network device firmware, etc. -->
any

##### STEPS TO REPRODUCE
<!--- Describe exactly how to reproduce the problem, using a minimal test-case -->
put callback into collection and whitelist
<!--- Paste example playbooks or commands between quotes below -->
```yaml

```

<!--- HINT: You can paste gist.github.com links for larger files -->

##### EXPECTED RESULTS
<!--- Describe what you expected to happen when running the steps above -->
callback works

##### ACTUAL RESULTS
<!--- Describe what actually happened. If possible run with extra verbosity (-vvvv) -->
callback options are ignored
<!--- Paste verbatim command output between quotes -->
```paste below

```

callback_obj = callback_plugin()
            loaded_callbacks.add(callback_name)  
            callback_obj.set_options()
            self._callback_plugins.append(callback_obj)
        
        if self._run_additional_callbacks:
            
            
            for callback_plugin_name in (c for c in C.DEFAULT_CALLBACK_WHITELIST if c not in loaded_callbacks):
                
                callback_obj, plugin_load_context = callback_loader.get_with_context(callback_plugin_name)
                if callback_obj:
                    loaded_as_name = callback_obj._redirected_names[-1]
                    if loaded_as_name in loaded_callbacks:
                        display.warning("Skipping callback '%s', already loaded as '%s'." % (callback_plugin_name, loaded_as_name))
                        continue
                    loaded_callbacks.add(loaded_as_name)
                    callback_obj.set_options()
                    self._callback_plugins.append(callback_obj)
                else:
                    display.warning("Skipping '%s', unable to load or use as a callback" % callback_plugin_name)
        self._callbacks_loaded = True
    def run(self, play):
        '''
        Iterates over the roles/tasks in a play, using the given (or default)
        strategy for queueing tasks. The default is the linear strategy, which
        operates like classic Ansible by keeping all hosts in lock-step with
        a given task (meaning no hosts move on to the next task until all hosts
        are done with the current task).
        '''