### Issue description

Include a description of the issue encountered, and what the expected behavior
was. Also include any configuration, test suite, or other relevant information
to reproduce the issue.

Note if you encounter an error message try to re-run the command with --debug to print any tracebacks

### System information

**stestr version (`stestr --version`):**

**Python release (`python --version`):**

**pip packages (`pip freeze`):**


### Additional information

Add an issue template to project
Add an issue template to project

While most of the bugs have been filed by the project maintainers it
still good to provide a template on some commonly needed information to
triage bugs. Especially including a note about --debug which is needed
to capture tracebacks.
