Add galera-cluster-upgrade job template

  * recover autoadding upgrade_rabbitmq accidentaly removed by
    I24d5b65b92c3b3c22c710a21ed5a5306e7f3bc13

(cherry picked from commit 96a6c79abe803e89c4924e184b779aa7aec2c536)

Change-Id: Ibd72431c2e6f0bd91c94362377262371381d1796
Related-prod: PROD-29630
2 files changed