CIF-1786 - Implement ComponentExporter for related products component

[cjelger]

• adding json exporter similar to productcarousel

How Has This Been Tested?

Added unit tests.

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:

• 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 #537 (523b246) into master (2b22643) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##             master     #537      +/-   ##
============================================
+ Coverage     87.45%   87.47%   +0.01%     
- Complexity     1263     1267       +4     
============================================
  Files           232      232              
  Lines          5948     5954       +6     
  Branches        874      874              
============================================
+ Hits           5202     5208       +6     
  Misses          582      582              
  Partials        164      164              

Flag	Coverage Δ	Complexity Δ
integration	64.30% <18.18%> (-0.13%)	0.00 <8.00> (ø)
jest	83.33% <ø> (ø)	0.00 <ø> (ø)
karma	94.54% <ø> (ø)	0.00 <ø> (ø)
unittests	87.61% <100.00%> (+0.02%)	0.00 <8.00> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ	Complexity Δ
...models/v1/productcarousel/ProductCarouselImpl.java	85.93% <100.00%> (ø)	26.00 <0.00> (ø)
...models/v1/relatedproducts/RelatedProductsImpl.java	88.46% <100.00%> (+1.50%)	21.00 <8.00> (+4.00)

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