##### SUMMARY

In the Kubernetes collection's CI tests, the sanity check, which uses `ansible-test sanity --docker -v --color --python 3.6`, started failing with the following error:

```
ERROR: Command "importer.py" returned exit status 1.
>>> Standard Error
Traceback (most recent call last):
  File "/root/ansible/ansible_collections/community/kubernetes/tests/output/.tmp/sanity/import/minimal-py36/bin/importer.py", line 447, in <module>
    main()
  File "/root/ansible/ansible_collections/community/kubernetes/tests/output/.tmp/sanity/import/minimal-py36/bin/importer.py", line 51, in main
    from ansible.utils.collection_loader import AnsibleCollectionLoader
  File "/root/ansible/lib/ansible/utils/collection_loader.py", line 15, in <module>
    from ansible import constants as C
  File "/root/ansible/lib/ansible/constants.py", line 12, in <module>
    from jinja2 import Template
ModuleNotFoundError: No module named 'jinja2'
```

Nothing in the collection has changed in the past week, and no runs failed until this morning's CI run, so it seems something committed to ansible/ansible `devel` has caused this failure.

##### ISSUE TYPE

- Bug Report

##### COMPONENT NAME

ansible-test

##### ANSIBLE VERSION

devel (as of this morning)

##### CONFIGURATION

N/A - defaults

##### OS / ENVIRONMENT

Linux

##### STEPS TO REPRODUCE

  1. Clone kubernetes collection repo
  2. Install Ansible @ devel
  3. Run `ansible-test sanity --docker -v --color --python 3.6`

##### EXPECTED RESULTS

Tests should pass, as they have for the past few weeks.

##### ACTUAL RESULTS

Test fail, with the message in this issue's summary.
display.display(json.dumps(text, sort_keys=True, indent=4))
def add_collection_plugins(plugin_list, plugin_type):
    colldirs = list_collection_dirs()
    for ns in colldirs.keys():
        for path in colldirs[ns]:
            collname = get_collection_name_from_path(path)
            ptype = C.COLLECTION_PTYPE_COMPAT.get(plugin_type, plugin_type)
            plugin_list.update(DocCLI.find_plugins(os.path.join(path, 'plugins', ptype), plugin_type, collname))
class RemovedPlugin(Exception):
    pass
class PluginNotFound(Exception):
    pass
class DocCLI(CLI):
    ''' displays information on modules installed in Ansible libraries.
        It displays a terse listing of plugins and their short descriptions,
        provides a printout of their DOCUMENTATION strings,
        and it can create a short "snippet" which can be pasted into a playbook.  '''
    
    IGNORE = ('module', 'docuri', 'version_added', 'short_description', 'now_date', 'plainexamples', 'returndocs')
    def __init__(self, args):