[Kotlin] Get rid of "infrastructure" folder inside generated artifact package name

Description

I have a config file which specifies the apiPackage, modelPackage and invokerPackage. With apiPackage and modelPackage it works but for the invokerPackage it always takes the default org/openapitools/client/ directory (and the folder is named infrastructure instead of invoker?).
With Java it works, so it must have something to do with openapi itself.

openapi-generator version

5.0.0-SNAPSHOT

Command line used for generation

java -jar modules/openapi-generator-cli/target/openapi-generator-cli.jar generate -i /path/to/swagger.json -g kotlin -o /path/to/output -c /path/to/config.json --additional-properties useRxJava2=true

config.json

{
"apiPackage":"ch.something.something.httpclient.api",
"modelPackage":"ch.something.something.httpclient.model",
"invokerPackage":"ch.something.something.httpclient.invoker",
"library": "jvm-retrofit2"
}

Reproduce the issue with the supplied CLI command, config.json, and jvm-retrofit2 library, then compare the Kotlin output with the reported Java behavior. Trace how the Kotlin generator handles apiPackage, modelPackage, and invokerPackage; done means the configured invokerPackage is used without the default infrastructure folder.