[JAVA] Bug generating models only

Description

Setting the <generateApis> configProperty to false does not prevent the client code from being generated. This requires that a <library> be imported for generated code that isn't desired or used.

Swagger-codegen version

3.0.14

Swagger declaration file content or url

---
swagger: "2.0"
definitions:
  Order:
    type: "object"
    properties:
      id:
        type: "integer"
        format: "int64"
    xml:
      name: "Order"

<plugin>
    <groupId>io.swagger.codegen.v3</groupId>
    <artifactId>swagger-codegen-maven-plugin</artifactId>
    <version>${swagger-codegen-maven-plugin.version}</version>
    <executions>
        <execution>
            <goals>
                <goal>generate</goal>
            </goals>
            <configuration>
                <inputSpec>swagger.yaml</inputSpec>
                <language>java</language>
                <generateApis>false</generateApis>
                <generateApiTests>false</generateApiTests>
                <generateApiDocumentation>false</generateApiDocumentation>
                <configOptions>
                    <generateApis>false</generateApis>
                    <generateApiTests>false</generateApiTests>
                    <generateApiDocumentation>false</generateApiDocumentation>
                    <useOas2>true</useOas2>
                    <java8>true</java8>
                    <dateLibrary>java8</dateLibrary>
                </configOptions>
                <library>jersey2</library>
            </configuration>
        </execution>
    </executions>
</plugin>

Command line used for generation

mvn clean compile

Steps to reproduce

Related issues/PRs

• https://github.com/swagger-api/swagger-codegen/issues/8562#issuecomment-412407505
• https://github.com/swagger-api/swagger-codegen/issues/9271
• https://github.com/swagger-api/swagger-codegen/issues/8290
• https://github.com/swagger-api/swagger-codegen/issues/8781

Suggest a fix/enhancement

The suggestion in 8562 did not work for me. I've tried putting <generateApis>false</generateApis> under <configuration> as well as <configOptions>. I've tried setting it under both as well, but no dice

Start by reproducing the issue with the shown Maven plugin configuration and Swagger definition using mvn clean compile. Trace how the Java generator handles generateApis=false while generating the Order model, and compare the generated output with the requested configuration. Done means client API code is omitted while model generation still works.