fix: When enum in object property was null, it broke

[Delawen]

Fixes #762

[codecov]

Codecov Report

Merging #772 (bb8c76b) into main (b23298c) will not change coverage.
The diff coverage is 0.00%.

@@            Coverage Diff            @@
##               main     #772   +/-   ##
=========================================
  Coverage     79.04%   79.04%           
+ Complexity      160      159    -1     
=========================================
  Files            54       54           
  Lines          3064     3064           
  Branches        534      535    +1     
=========================================
  Hits           2422     2422           
+ Misses          420      417    -3     
- Partials        222      225    +3     

Impacted Files	Coverage Δ
.../step/parser/kamelet/KameletStepParserService.java	69.20% <0.00%> (+1.20%)	⬆️

... and 1 file with indirect coverage changes

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
2.5% Duplication