I have installed Jenkins Blue Ocean on the ODL sandbox environment. Although Blue Ocean is installed on the Jenkins Sandbox environment, all existing CI jobs need to be migrated to pipelines [2.] and Jenkinsfile to be created for each of the Job templates. 

On the left hand side of the Jenkins Sandbox landing page you should now be able see "Blue Ocean" link.

Note: Blue Ocean does not support tabs and all jobs would be listed on a single giant page. 

Regards,
Anil Belur

[1.] https://jenkins.opendaylight.org/sandbox/

[2.] https://jenkins.opendaylight.org/sandbox/blue/organizations/jenkins/pipelines

[3.] https://gerrit.linuxfoundation.org/infra/admin/repos/releng/pipelines