Feature/46 product eigenaar

[Floris272]

Fixes #46

Changes
Add eigenaar model with a fk to product

(rol was renamed to eigenaar)

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 95.94595% with 6 lines in your changes missing coverage. Please review.

Project coverage is 87.01%. Comparing base (f00b267) to head (65010ce).
Report is 41 commits behind head on master.

Files with missing lines	Patch %	Lines
src/open_producten/producten/admin/eigenaar.py	68.75%	5 Missing ⚠️
src/open_producten/producten/models/eigenaar.py	96.87%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #61      +/-   ##
==========================================
+ Coverage   84.92%   87.01%   +2.09%     
==========================================
  Files         106      120      +14     
  Lines        2269     2627     +358     
  Branches      149      174      +25     
==========================================
+ Hits         1927     2286     +359     
+ Misses        319      316       -3     
- Partials       23       25       +2     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.