Issue 2196 fix unittest warnings

[syneva-runyan]

Issue: #2196

What I did

Fixed warning being outputting from unit tests.

[codecov]

Codecov Report

Merging #2343 into master will increase coverage by 0.03%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #2343      +/-   ##
==========================================
+ Coverage    21.2%   21.23%   +0.03%     
==========================================
  Files         283      283              
  Lines        6155     6155              
  Branches      736      714      -22     
==========================================
+ Hits         1305     1307       +2     
- Misses       4271     4303      +32     
+ Partials      579      545      -34

Impacted Files	Coverage Δ
lib/ui/src/modules/ui/components/layout/index.js	80.35% <ø> (ø)	⬆️
addons/info/src/components/markdown/text.js	77.77% <100%> (+11.11%)	⬆️
app/react/src/server/utils.js	0% <0%> (-53.58%)	⬇️
lib/ui/src/modules/ui/configs/handle_keyevents.js	33.33% <0%> (ø)	⬆️
.../src/manager/containers/CommentsPanel/dataStore.js	34.04% <0%> (ø)	⬆️
lib/ui/src/modules/ui/libs/filters.js	47.36% <0%> (ø)	⬆️
addons/a11y/src/A11yManager.js	0% <0%> (ø)	⬆️
lib/ui/src/modules/ui/libs/hierarchy.js	48.8% <0%> (ø)	⬆️
lib/ui/src/modules/ui/containers/left_panel.js	25.71% <0%> (ø)	⬆️
addons/info/src/components/PropVal.js	41.41% <0%> (ø)	⬆️
... and 28 more

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[ndelangen]

Maybe we should change the component name too? Looks like it's now called P, but renders a DIV.

Thanks to the comment we do know why though 👍 .

[syneva-runyan]

Yeah it would make sense to change it, but in that case, do we go ahead and distinguish when the component is used as a wrapper and when it's just used as <p> tag? Or if not, what do we rename this to?

[Hypnosphi]

Great!

@syneva-runyan can you do the same for release/3.3 branch after we merge this PR?

[syneva-runyan]

@Hypnosphi sure.

[Hypnosphi]

@syneva-runyan please uncomment those lines when making the PR for release/3.3: https://github.com/storybooks/storybook/blob/release/3.3/scripts/jest.init.js#L17-L22