CIF-1394 - Product asset drag'n'drop on a page should configure produ…

[cjelger]

…ct teaser

• make sure that the product drag and drop properly configures the product teaser component

Motivation and Context

The AEM drag and drop is handled by the Sling @CopyFrom request parameter which is basically a POST that copies data from one location to another, but does not store data at the request URL. This PR takes care of that.

How Has This Been Tested?

Extended unit tests and manually tested.

Types of changes

• [x] 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.
• [x] I have added tests to cover my changes and the overall coverage did not decrease.
• [x] All unit tests pass on CircleCi.
• [x] I ran all tests locally and they pass.

[codecov[bot]]

Codecov Report

Merging #130 into master will increase coverage by 0.07%. The diff coverage is 91.66%.

@@             Coverage Diff              @@
##             master     #130      +/-   ##
============================================
+ Coverage     87.37%   87.45%   +0.07%     
- Complexity      492      495       +3     
============================================
  Files            35       35              
  Lines          1893     1905      +12     
  Branches        291      293       +2     
============================================
+ Hits           1654     1666      +12     
  Misses          106      106              
  Partials        133      133              

Flag	Coverage Δ	Complexity Δ
#integration	48.91% <0.00%> (-0.34%)	253.00 <0.00> (ø)
#karma	92.71% <ø> (ø)	0.00 <ø> (ø)
#unittests	83.86% <91.66%> (+0.11%)	479.00 <1.00> (+3.00)

Impacted Files	Coverage Δ	Complexity Δ
...stprocessor/MultiFieldDropTargetPostProcessor.java	91.66% <91.66%> (+1.66%)	19.00 <1.00> (+3.00)

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