Install docker on tools jenkins.

playbooks/roles/tools_jenkins/meta/main.yml

@@ -9,4 +9,8 @@ dependencies:
     jenkins_deb_url: "https://pkg.jenkins.io/debian-stable/binary/jenkins_{{ jenkins_version }}_all.deb"
     jenkins_custom_plugins: []
     jenkins_bundled_plugins: "{{ jenkins_tools_bundled_plugins }}"
-    jenkins_debian_pkgs: "{{ jenkins_tools_debian_pkgs }}"
\ No newline at end of file
+    jenkins_debian_pkgs: "{{ jenkins_tools_debian_pkgs }}"
+  # Needed to be able to build docker images. Used by Docker Image Builder Jobs.
+  - role: docker-tools
+    docker_users:
+        - jenkins