[Java] Client generation - Duplicate variable declaration

Description

I am generating a Java client. The generation is fine and no errors. However during compile I get an error as described below.

Swagger-codegen version

2.3.1

Swagger declaration file content or url

https://www.zuora.com/wp-content/themes/zuora/yaml/swagger.yaml

Command line used for generation

Using Gradle plugin.

Steps to reproduce

1. Generate client
2. Try to compile generated code

/zuora/api/ConnectionsApi.java:99: error: variable contentType is already defined in method pOSTConnections(String,String,String,String)
        final MediaType contentType = apiClient.selectHeaderContentType(contentTypes);

Suggest a fix/enhancement

Looking in the generated file is clear what the issue is. The method signature has a String contentType param.

public CommonResponseType pOSTConnections(String apiAccessKeyId, String apiSecretAccessKey, String contentType, String zuoraEntityIds)

However later in the method it is getting redeclared as a MediaType.

final MediaType contentType = apiClient.selectHeaderContentType(contentTypes);

Reproduce the generated Java client with the linked Swagger YAML and Gradle plugin, then inspect /zuora/api/ConnectionsApi.java around pOSTConnections. Trace that output back to the Java client-generation template and verify the generated client compiles without the duplicate contentType declaration.