Integrate maven version of Tamaya into JSON being exposed in its implementation

While working on TAMAYA-134 I stumbled upon

org.apache.tamaya.server.ConfigurationResource

containing the following JSON snippet in its
version():

"{ \"version\" : \"Apache Tamaya: 0.2-incubating\" }"

.

This information should be calculated depending on mvn version information.
One way is to generate a class with maven-resource-plugin that contains the version such as:

class Version {
 private String version = "${project.version}";
 public String getVersion() {
   return version;
 }
}

This class can be used in a static matter in this endpoint.