CIF-1120 - Make loading of countries in checkout more robust

[herzog31]

Description

• Fixes "Country US is not an available country" error in address forms during checkout.

How Has This Been Tested?

• Manual testing
• Updated unit test

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• I have signed the Adobe Open Source CLA.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes and the overall coverage did not decrease.
• All unit tests pass on CircleCi.
• I ran all tests locally and they pass.

[codecov]

Codecov Report

Merging #160 into master will increase coverage by 0.96%.
The diff coverage is 77.77%.

@@             Coverage Diff              @@
##             master     #160      +/-   ##
============================================
+ Coverage     54.92%   55.89%   +0.96%     
  Complexity      406      406              
============================================
  Files           140      140              
  Lines          3814     3818       +4     
  Branches        665      668       +3     
============================================
+ Hits           2095     2134      +39     
+ Misses         1636     1601      -35     
  Partials         83       83

Flag	Coverage Δ	Complexity Δ
#jest	37.89% <77.77%> (+1.62%)	0 <0> (ø)	⬇️
#karma	93.66% <ø> (ø)	0 <ø> (ø)	⬇️
#unittests	81.34% <ø> (ø)	406 <ø> (ø)	⬇️

Impacted Files	Coverage Δ	Complexity Δ
react-components/src/utils/hooks.js	94.44% <100%> (ø)	0 <0> (ø)	⬇️
...components/src/components/Checkout/editableForm.js	43.24% <71.42%> (+40.38%)	0 <0> (ø)	⬇️
...-components/src/components/Checkout/addressForm.js	76.47% <0%> (+52.94%)	0% <0%> (ø)	⬇️

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[mhaack]

Veryfied