Mix of junit4 and junit5 in Java generator in 7.7.0

Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator (example)?
• Have you tested with the latest master to confirm the issue still exists?
• Have you searched for related issues/PRs?
• What's the actual output vs expected output?
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Description

I am getting this error when I am trying to build the library using 7.7.0 version

error: package org.junit.jupiter.api does not exist
import org.junit.jupiter.api.Test;

Inside the test class I see import org.junit.jupiter.api.Test; but the API is referring to junit4. I see that this issue has been fixed in 7.6.0 using this PR https://github.com/OpenAPITools/openapi-generator/pull/18741, but I am getting the same error even with 7.7.0.

openapi-generator version

7.7.0

OpenAPI declaration file content or url

Generation Details

openapi-generator-cli generate
-i ./api/swagger/swagger.yaml
-g java
--additional-properties useRxJava2=true,serializableModel=true,dateLibrary=java11,hideGenerationTimestamp=true,booleanGetterPrefix=is,sortParamsByRequiredFlag=false \

Steps to reproduce

Related issues/PRs

https://github.com/OpenAPITools/openapi-generator/issues/18465

Suggest a fix

Start by reproducing the report with the supplied openapi-generator-cli command and inspect the generated Java test class and its JUnit dependency. Read PR 18741 and issue 18465 for context, then verify that the generated tests and declared dependency use a consistent JUnit version and that the generated library builds successfully.