##### 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.
if collection:
                    plugin = '%s.%s' % (collection, plugin)
                plugin_list.add(plugin)
                display.vvvv("Added %s" % plugin)
        return plugin_list
    def _get_plugin_list_descriptions(self, loader):
        descs = {}
        plugins = self._get_plugin_list_filenames(loader)
        for plugin in plugins.keys():
            filename = plugins[plugin]
            doc = None
            try:
                doc = read_docstub(filename)
            except Exception:
                display.warning("%s has a documentation formatting error" % plugin)
                continue
            if not doc or not isinstance(doc, dict):
                with open(filename) as f:
                    metadata = extract_metadata(module_data=f.read())
                if metadata[0]:
                    if 'removed' not in metadata[0].get('status', []):
                        display.warning("%s parsing did not produce documentation." % plugin)
                    else:
                        continue
                desc = 'UNDOCUMENTED'
            else:
                desc = doc.get('short_description', 'INVALID SHORT DESCRIPTION').strip()
            descs[plugin] = desc
        return descs
    def _get_plugin_list_filenames(self, loader):