Add Uncovered Types to Ecephys Tutorial

[ehennestad]

Motivation

Reach 100% type coverage in tutorials

How to test the behavior?

Run ecephys tutorial

Checklist

• [x] Have you ensured the PR description clearly describes the problem and solutions?
• [x] Have you checked to ensure that there aren't other open or previously closed Pull Requests for the same change?
• [x] If this PR fixes an issue, is the first line of the PR description fix #XX where XX is the issue number?

[ehennestad]

The failing test is related to this issue: https://github.com/NeurodataWithoutBorders/nwbinspector/issues/534