fix: reuses shared object mapper instead of recreating them

[lburgazzoli]

Fixes #786

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
2.1% Duplication

[codecov]

Codecov Report

Merging #796 (25b06d0) into main (af4fbbd) will decrease coverage by 0.01%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##               main     #796      +/-   ##
============================================
- Coverage     79.17%   79.16%   -0.01%     
  Complexity      167      167              
============================================
  Files            56       57       +1     
  Lines          3040     3029      -11     
  Branches        529      529              
============================================
- Hits           2407     2398       -9     
+ Misses          417      415       -2     
  Partials        216      216              

Impacted Files	Coverage Δ
...api/rest/resource/v1/OpenApiToRestDslResource.java	100.00% <100.00%> (ø)
...o/backend/api/resource/v1/DeploymentsResource.java	84.00% <100.00%> (+0.32%)	⬆️
.../main/java/io/kaoto/backend/camel/KamelHelper.java	100.00% <100.00%> (ø)
...in/java/io/kaoto/backend/camel/KamelPopulator.java	88.63% <100.00%> (-0.09%)	⬇️
...data/parser/step/kamelet/KameletFileProcessor.java	83.13% <100.00%> (ø)
...amel/service/deployment/generator/Representer.java	100.00% <100.00%> (ø)
...elroute/IntegrationDeploymentGeneratorService.java	70.96% <100.00%> (+2.71%)	⬆️
...t/generator/camelroute/IntegrationRepresenter.java	100.00% <100.00%> (ø)
...elet/KameletBindingDeploymentGeneratorService.java	72.89% <100.00%> (-0.74%)	⬇️
...tor/kamelet/KameletDeploymentGeneratorService.java	66.66% <100.00%> (-0.65%)	⬇️
... and 6 more

[lburgazzoli]

code coverage is expected to fail at this stage