[JAVA] Bug. The configuration of dateLibrary does not take effect.

Description

When I use swagger-codegen-cli to generate java client, I found that no matter how my dateLibrary config is configured, such as {"dateLibrary": "java11"}, the generated model code will import org.joda.time.*.

Swagger-codegen version

3.0.34

Swagger declaration file content or url

Command line used for generation

java -jar swagger-codegen-cli.jar generate \
    -l java \
    -o ./java-sdk \
    -i ./docs/api-0.3.0.yaml \
    -s false \
    -c java-sdk-config.json \

java-sdk-config.json

{
    "dateLibrary": "java11",
    "fullJavaUtil": true ,
    "library": "retrofit2"
}

Start by reproducing the generation command with java-sdk-config.json and inspect the generated model imports. Trace how the Java generator handles the dateLibrary setting and which Mustache templates produce the model code. Done means a java11 configuration no longer generates org.joda.time imports, with the relevant generation behavior covered by tests if existing tests can be located.