Missing return value caused stemcell to always default to oldest
Missing return value caused stemcell to always default to oldest

cf-platform-eng/tile-generator,alex-slynko/tile-generator,alex-slynko/tile-generator,cf-platform-eng/tile-generator,cf-platform-eng/tile-generator,alex-slynko/tile-generator,alex-slynko/tile-generator,cf-platform-eng/tile-generator