Update credentials- and ssh-credentials-plugin

Several plugins used in the CI weren't starting anymore in newly built
master images, because the ssh-credentials- and credentials-plugin
version was too old.

This change updates the plugin versions to the versions that are
required to load all plugins, which previously failed to start up.

Change-Id: Ief1baa360e29299210e128efc0687d6df1e8199b
1 file changed
tree: 94a8b3faa28cf6a40e025e2c434ee6d6c444bdbf
  1. jenkins/
  2. jenkins-docker/
  3. worker/
  4. .gitignore