chore(tests): fixed unexpected router key warning

[mhuggins]

Description

Fixes a console warning that began after switching to connected-react-router.

Motivation and Context

console.error node_modules/redux/lib/utils/warning.js:14
  Unexpected key "router" found in preloadedState argument passed to createStore.
  Expected to find one of the known reducer keys instead: "spunky", "dialogs",
  "browser", "requests", "toasts". Unexpected keys will be ignored.

How Has This Been Tested?

yarn test

Types of changes

• Chore (tests, refactors, and fixes)
• New feature (adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist

• I have read the CONTRIBUTING guidelines and confirm that my code follows the code style of this project.
• Tests for the changes have been added (for bug fixes/features)

Documentation

• Docs need to be added/updated (for bug fixes/features)

Closing issues

N/A

[codecov]

Codecov Report

Merging #453 into develop will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop     #453   +/-   ##
========================================
  Coverage    53.08%   53.08%           
========================================
  Files          153      153           
  Lines         1230     1230           
  Branches       161      161           
========================================
  Hits           653      653           
  Misses         486      486           
  Partials        91       91

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