Incorrect target output from mapper in pattern case

[der]

With a deployment.yaml such as:

name:  epimorphics/nrw-bwq-profiles
deployments:
  - prod:
      tag: "{ver}"
  - dev:
      branch: dev

Tag the repo as e.g. 1.1.1. In the current mapper implementation the mapper will return a target of 1.1.1 instead of prod which, when used with the ansible deployment, will mean 1.1.1 is used as the stage (i.e. environment).