License check via the <a href="https://github.com/eclipse/dash-licenses">Dash-Licenses</a> tool provided by the Eclipse Foundation.
<ul>
  <li>Clones the latest "master" of Eclipse Ditto</li>
  <li>Downloads the dash-licenses tool</li>
  <li>Gathers all used compile and runtime dependency of Ditto-Clients</li>
  <li>Excecutes the dash-licenses tool with the gathered dependencies</li>
  <li>Attaches the results to the build</li>
</ul>