ServiceImpl generated in bad package

Versions

1.0.25 - swagger-codegen-generators
3.0.25 - swagger-codegen-maven-plugin - generator jaxrs-resteasy-eap

Description

I generate java components from swagger with the jaxrs-resteasy-eap generator using swagger-codegen-maven-plugin maven plugin.
The service implementation file aren't generated in the same package declaration and the project doesn't compile.

Steps to reproduce

1. Configure the pom file on your project as below :

<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>build-helper-maven-plugin</artifactId>
<version>3.2.0</version>
<executions>
	<execution>
		<id>add-source</id>
		<phase>generate-sources</phase>
		<goals>
			<goal>add-source</goal>
		</goals>
		<configuration>
			<sources>
				<source>src/main/generated-sources</source>
			</sources>
		</configuration>
	</execution>
</executions>
</plugin>

<plugin>
<groupId>io.swagger.codegen.v3</groupId>
<artifactId>swagger-codegen-maven-plugin</artifactId>
<version>3.0.25</version>
<dependencies>
	<dependency>
		<groupId>io.swagger.codegen.v3</groupId>
                <artifactId>swagger-codegen-generators</artifactId>
    	        <version>1.0.26-SNAPSHOT</version>
	</dependency>
</dependencies>

<configuration>
	<inputSpec>${project.basedir}/src/main/resources/openapi-demo.yaml</inputSpec>
	<language>jaxrs-resteasy-eap</language>
	<configOptions>
		<sourceFolder>src/main/java</sourceFolder>
		<dateLibrary>java8-localdatetime</dateLibrary>
		<interfaceOnly>false</interfaceOnly>
		<java8>true</java8>
		<library>resteasy</library>
	</configOptions>
	<output>${project.build.directory}/generated-sources</output>
</configuration>
<executions>
	<execution>
		<id>generate-openapi</id>
		<phase>generate-sources</phase>
		<goals>
			<goal>generate</goal>
		</goals>
		<configuration>
			<modelPackage>fr.example.demo.model</modelPackage>
			<apiPackage>fr.example.demo.api</apiPackage>
			<invokerPackage>fr.example.demo</invokerPackage>
			<generateApis>true</generateApis>
			<generateModels>true</generateModels>
			<generateModelDocumentation>false</generateModelDocumentation>
			<generateModelTests>true</generateModelTests>
			<generateSupportingFiles>false</generateSupportingFiles>
			<ignoreFileOverride>${project.basedir}/swagger-codegen-ignore</ignoreFileOverride>
		</configuration>
	</execution>
</executions>
</plugin>

2. Generate the java code with swagger-codegen-maven-plugin plugin and jaxrs-resteasy-eap generator (mvn clean install on your project)

Start by reproducing the generation with the supplied pom configuration, the jaxrs-resteasy-eap generator, and the openapi-demo.yaml input. Inspect the generated ServiceImpl package declaration and compare it with the configured apiPackage; done means the generated project compiles with the implementation in the expected package.