##### 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 not self._dirtree:
            self._init_dirtree()
        if '.' not in filename:  
            extensionless_re = re.compile(r'^{0}(\..+)?$'.format(re.escape(filename)))
            
            try:
                
                filepath = next(os.path.join(r, f) for r, f in self._dirtree if extensionless_re.match(f))
            except StopIteration:
                raise IOError("couldn't find {0}".format(filename))
        else:  
            
            try:
                filepath = next(os.path.join(r, f) for r, f in self._dirtree if f == filename)
            except StopIteration:
                raise IOError("couldn't find {0}".format(filename))
        return filepath
    def get_data(self, filename):
        found_file = self.find_file(filename)
        with open(found_file, 'rb') as fd:
            return fd.read()
class AnsibleCollectionRef: