spawned from the research/spike ticket (OCMUI-3043), this ticket aims to implement a fix for the repeating failures of the OCM UI SaaS Openshift rolling-deployment pipeline for Staging, due to it being triggered before the corresponding master jenkins build-job has finished.

the recommended solution is to define that dependency in the app's deploy.yml file.

more specifically, to add an upstream field to the Staging deployment definition - use this change as an example.

(see the spike ticket for more details on the problem and on the proposed solution).