Deprecate react-unit-test-utils 8/15

[diana-villalvazo-wgu]

Description

Remove use of 'shallow' (react-unit-test-utils) in following files:

• src/containers/CoursesPanel/index.test.jsx
• src/containers/Dashboard/DashboardLayout.test.jsx
• src/containers/Dashboard/index.test.jsx
• src/containers/Dashboard/LoadingView.test.jsx
• src/containers/EmailSettingsModal/index.test.jsx

Note: As part of this work we find out paragon components were mocked on src/setupTest.jsx causing testing library unit tests to fail, since we are doing this work in multiple PRs and in order to not break other existing snapshot tests, we will unmock paragon or needed things on new tests and by end of react-unit-test-utils removal we will remove paragon mocks and unmock lines accordingly.

Support Information

Closes #648

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.59%. Comparing base (ab0f139) to head (fe86c2c).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #664   +/-   ##
=======================================
  Coverage   97.59%   97.59%           
=======================================
  Files         152      152           
  Lines        1332     1332           
  Branches      229      230    +1     
=======================================
  Hits         1300     1300           
  Misses         31       31           
  Partials        1        1           

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[MaxFrank13]

Thanks!

[diana-villalvazo-wgu]

rebased master 👍