RFS: jenkins-json/2.4-jenkins-3-2

[Emmanuel Bourg <ebourg@apache.org>]

Hi again,

I also updated jenkins-json which is derived from libjson-java.

Here is the changelog:

  * Use the renamed method MultiKeyMap.removeMultiKey() introduced
    in libcommons-collections3-java 3.2.1-7
  * Switch to debhelper level 9
  * Use canonical URLs for the Vcs-* fields

Thank you,

Emmanuel Bourg