We don't have a CI for a release branch. for example we created branch-4.6 a month ago, but there is no CI covers branch-4.6.
I don't know what would be the best solution. for now, I clone a `bookkeeper-release-branch` from `bookkeeper-master` to run CI over `branch-4.6`. so we at least have a CI job running for current release branch. https://builds.apache.org/view/B/view/BK/job/bookkeeper-release-branch We need to think about a solution for this and how to manage this. - Sijie
