OpenTracing on Websphere liberty

[doychin]

In order to activate open tracing on WebSphere liberty microprofile an additional feature must be installed before final JAR is packaged.
For that this section is required in the maven file:

<plugin>
   <groupId>com.googlecode.maven-download-plugin</groupId>
   <artifactId>download-maven-plugin</artifactId>
   <version>1.4.0</version>
   <executions>
     <execution>
       <id>install-tracer</id>
       <phase>prepare-package</phase>
       <goals>
         <goal>wget</goal>
       </goals>
       <configuration>
         <url>https://github.com/WASdev/sample.opentracing.zipkintracer/releases/download/1.0/liberty-opentracing-zipkintracer-1.0-sample.zip</url>
         <unpack>true</unpack>
         <outputDirectory>${project.build.directory}/liberty/wlp/usr</outputDirectory>
       </configuration>
     </execution>
   </executions>
  </plugin>

There is a newer version of zipkin feature (1.1) which can also be used.

The problem is in the packaging part of WebSphere liberty maven plugin. It does not include the downloaded extension fold in the final JAR file.

Maven plugin actually calls WebSphere server to do the packaging.

A fix from IBM is required.