Pin versions of Blue Ocean-plugin dependencies

Since recently, for the Blue Ocean plugin for Jenkins dependencies with
the newest released version were downloaded, when building the master
docker image. These versions were not compatible with Jenkins 2.60.3.
This change pins the versions of the dependencies to a compatible
combination.

Change-Id: I1dcb76a683cd4322e7e78c70e43c9554b47eb59f
1 file changed
tree: 7296b87d59abcfcd652627fdec682c54befc3426
  1. jenkins/
  2. jenkins-docker/
  3. worker/
  4. .gitignore