Jackson2JsonObjectMapper should use Jackson2ObjectMapperBuilder and don't load modules unconditionally [INT-4318]

[spring-operator]

Artem Bilan opened INT-4318 and commented

The latest Spring Boot includes Kotlin Module for Jackson spring-projects/spring-boot#9803.

But at the same time there is no guarantee that our application has Kotlin SDK in the ClassPath.

Reconsider this.objectMapper.findAndRegisterModules(); in favor of org.springframework.http.converter.json.Jackson2ObjectMapperBuilder with more robust algorithm to build ObjectMapper instance.

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Affects: 5.0 M6

Reference URL: https://build.spring.io/browse/INTSAMPLES-NIGHTLY-2170/

Issue Links:

• JsonToObjectTransformer tries to load unexpected KotlinModule [INT-4319] #8262 JsonToObjectTransformer tries to load unexpected KotlinModule
  ("is duplicated by")

Referenced from: pull request #2209