##### 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.
super(DocCLI, self).run()
        plugin_type = context.CLIARGS['type']
        do_json = context.CLIARGS['json_format']
        if plugin_type in C.DOCUMENTABLE_PLUGINS:
            loader = getattr(plugin_loader, '%s_loader' % plugin_type)
        else:
            raise AnsibleOptionsError("Unknown or undocumentable plugin type: %s" % plugin_type)
        
        basedir = context.CLIARGS['basedir']
        if basedir:
            set_collection_playbook_paths(basedir)
            loader.add_directory(basedir, with_subdir=True)
        if context.CLIARGS['module_path']:
            for path in context.CLIARGS['module_path']:
                if path:
                    loader.add_directory(path)
        
        search_paths = DocCLI.print_paths(loader)
        loader._paths = None  
        
        if context.CLIARGS['list_files']:
            paths = loader._get_paths()
            for path in paths:
                self.plugin_list.update(DocCLI.find_plugins(path, plugin_type))
            add_collection_plugins(self.plugin_list, plugin_type)
            plugins = self._get_plugin_list_filenames(loader)
            if do_json:
                jdump(plugins)
            else: