Update the Zipkin Server jar coordinates
Update the Zipkin Server jar coordinates

The group ID has changed in recent versions, so the previous download link would not download the latest version.
See https://github.com/openzipkin/openzipkin.github.io/issues/136
christophd/camel,CodeSmell/camel,nikhilvibhav/camel,CodeSmell/camel,apache/camel,mcollovati/camel,ullgren/camel,adessaigne/camel,pmoerenhout/camel,gnodet/camel,CodeSmell/camel,cunningt/camel,alvinkwekel/camel,zregvart/camel,adessaigne/camel,tadayosi/camel,tadayosi/camel,adessaigne/camel,pax95/camel,zregvart/camel,nicolaferraro/camel,DariusX/camel,christophd/camel,DariusX/camel,CodeSmell/camel,pmoerenhout/camel,nicolaferraro/camel,ullgren/camel,alvinkwekel/camel,pax95/camel,DariusX/camel,cunningt/camel,tdiesler/camel,adessaigne/camel,adessaigne/camel,gnodet/camel,apache/camel,nikhilvibhav/camel,cunningt/camel,christophd/camel,christophd/camel,mcollovati/camel,christophd/camel,pmoerenhout/camel,objectiser/camel,DariusX/camel,alvinkwekel/camel,apache/camel,objectiser/camel,tadayosi/camel,mcollovati/camel,gnodet/camel,pmoerenhout/camel,tadayosi/camel,ullgren/camel,nikhilvibhav/camel,pax95/camel,alvinkwekel/camel,pmoerenhout/camel,nicolaferraro/camel,nicolaferraro/camel,adessaigne/camel,mcollovati/camel,pax95/camel,apache/camel,tdiesler/camel,pax95/camel,pmoerenhout/camel,tdiesler/camel,objectiser/camel,nikhilvibhav/camel,zregvart/camel,apache/camel,tdiesler/camel,cunningt/camel,zregvart/camel,christophd/camel,gnodet/camel,gnodet/camel,tadayosi/camel,cunningt/camel,tdiesler/camel,objectiser/camel,apache/camel,ullgren/camel,tdiesler/camel,cunningt/camel,tadayosi/camel,pax95/camel