Fix AWS Lambda tests

[antonpirker]

Our AWS Lambda tests rely on outputting our events as JSON to stdout and parsing this output. AWS Lambda limits the amount of stdout it returns.

So by reducing the size of the events we can fix the tests, that where broken by printing to much data to stdout so the output is truncated and can not be parsed into actual JSON structures again.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.33%. Comparing base (417be9f) to head (1d291dc).
Report is 1 commits behind head on master.

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3770      +/-   ##
==========================================
+ Coverage   84.26%   84.33%   +0.06%     
==========================================
  Files         136      136              
  Lines       14418    14418              
  Branches     2429     2429              
==========================================
+ Hits        12150    12159       +9     
+ Misses       1516     1507       -9     
  Partials      752      752              

see 4 files with indirect coverage changes