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

```

if gotit is not None:
                    methods.append(gotit)
            
            new_args = []
            
            
            
            is_implicit_task = False
            for arg in args:
                
                if isinstance(arg, TaskResult):
                    new_args.append(arg.clean_copy())
                
                
                else:
                    new_args.append(arg)
                if isinstance(arg, Task) and arg.implicit:
                    is_implicit_task = True
            if is_implicit_task and not wants_implicit_tasks:
                continue
            for method in methods:
                try:
                    method(*new_args, **kwargs)
                except Exception as e:
                    
                    display.warning(u"Failure using method (%s) in callback plugin (%s): %s" % (to_text(method_name), to_text(callback_plugin), to_text(e)))
                    from traceback import format_tb
                    from sys import exc_info
                    display.vvv('Callback Exception: \n' + ' '.join(format_tb(exc_info()[2])))