See <https://builds.apache.org/job/karaf-2.x/653/>
- Jenkins build became unstable: karaf-2.x #650 Apache Jenkins Server
- Jenkins build is still unstable: karaf-2.x #651 Apache Jenkins Server
- Jenkins build is still unstable: karaf-2.x ... Apache Jenkins Server
- Jenkins build is still unstable: karaf-... Apache Jenkins Server
- Jenkins build is back to stable : k... Apache Jenkins Server
