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

```

#
#
#
#
from __future__ import (absolute_import, division, print_function)
__metaclass__ = type
import os
import tempfile
import threading
import time
import multiprocessing.queues
from ansible import constants as C
from ansible import context
from ansible.errors import AnsibleError
from ansible.executor.play_iterator import PlayIterator
from ansible.executor.stats import AggregateStats
from ansible.executor.task_result import TaskResult
from ansible.module_utils.six import PY3, string_types
from ansible.module_utils._text import to_text, to_native
from ansible.playbook.play_context import PlayContext
from ansible.playbook.task import Task
from ansible.plugins.loader import callback_loader, strategy_loader, module_loader
from ansible.plugins.callback import CallbackBase
from ansible.template import Templar
from ansible.vars.hostvars import HostVars
from ansible.vars.reserved import warn_if_reserved