relocate old maven group

[Bartosz Gałek]

in pom.xml we can hint maven central to redirect people trying to view old package:

<distributionManagement>
    <relocation>
      <groupId>org.bar</groupId>
    </relocation>
  </distributionManagement>

we should relocate old https://mvnrepository.com/artifact/pl.allegro.tech/opbox-opel to the new one ;)
https://maven.apache.org/guides/mini/guide-relocation.html