I solved it later:
1. Downloaded the cling jars from another repo manually and put it to the local repo.Adding the other repo in the pom.xml didn't work.
mrjdapter downloaded manaully too, from github, newer version.
Update: This happend if maven blocks http, https-repos works. Default in maven is blocking http. You have to change settings.xml in your maven conf-dir or your .maven/settings.xml

2. Put comment tags to the grobo entry in the pom.xml, its only necessary for tests.

Then to build the final .jar.