title: Is there a variable to find the last successful deployment to a stage?
body: <p>When deploying to a stage within a release pipeline, part of the process currently in place is to tidy up from the previous version deployed on that stage, which means telling the current deployment what the previous deployed version was.  This is currently being done manually with a custom variable, but it seems like it should be the sort of thing that can be retrieved from the agent.  Given a different number of releases with incremented revisions will occur earlier in the pipeline, the variables being used are per stage, rather than knowing what the previous version was throughout the whole pipeline.
  Does anyone know if there is a way to retrieve this?</p>