[JAVA] Bug generating a client with openfeign

Description

When attempting to generate a java client with open feign, the following error occurs when attempting to compile the code:

     [exec] [INFO] -------------------------------------------------------------
     [exec] [ERROR] COMPILATION ERROR :
     [exec] [INFO] -------------------------------------------------------------
     [exec] [ERROR] /Users/tseale/Documents/code/work/dapi-configuration/target/generated-sources/swagger/java/src/main/java/io/swagger/api/DefaultApiClient.java:[3,47] package org.springframework.cloud.openfeign does not exist
     [exec] [ERROR] /Users/tseale/Documents/code/work/dapi-configuration/target/generated-sources/swagger/java/src/main/java/io/swagger/api/DefaultApiClient.java:[6,2] cannot find symbol
     [exec]   symbol: class FeignClient
     [exec] [INFO] 2 errors

Swagger-codegen version

3.0.20, 2.4.14

Pom configuration used for generation

<plugin>
    <groupId>io.swagger</groupId>
    <artifactId>swagger-codegen-maven-plugin</artifactId>
    <version>${swagger-codegen-maven-plugin.version}</version>
    <executions>
        <execution>
            <id>generate-swagger-client-java</id>
            <phase>compile</phase>
            <goals>
                <goal>generate</goal>
            </goals>
            <configuration>
                <inputSpec>${project.build.directory}/swagger.json</inputSpec>
                <output>${swagger.codegen.output.dir.java}</output>
                <language>spring</language>
                <library>spring-cloud</library>
                <configOptions>
                     <generateForOpenFeign>true</generateForOpenFeign>
                    <groupId>${project.parent.groupId}</groupId>
                    <artifactId>${project.name}-java-client</artifactId>
                    <artifactVersion>${project.version}</artifactVersion>
                </configOptions>
            </configuration>
        </execution>
    </executions>
</plugin>

Steps to reproduce

1. Set the version to 2.4.14
2. Set the language to spring and the library to spring-cloud
3. Set the generateForOpenFeign option to true
4. auto generate the client with the above configurations
5. run the command mvn clean install in the auto generated project

Related issues/PRs

This is related to the support of openfeign in the 2.4.14 release: https://github.com/swagger-api/swagger-codegen/pull/9120

Suggest a fix/enhancement

the pom.mustache needs to include the dependency for openfeign instead of netflix.feign based on the generateForOpenFeign option.

Start by locating the generator's pom.mustache template and inspect how the generateForOpenFeign option selects dependencies. Reproduce the issue by generating the Java client with the listed Maven settings and running mvn clean install. Done means the generated project includes the OpenFeign dependency and compiles successfully; review PR 10319 for prior work.