Encapsulate pipline's gems_dir_url
Convert quotes for uninterpolated strings per our styleguide
Remove unused BOSH_CI_PIPELINE_BUCKET env var
Make duplicate more obvious
DRY pipeline fog_storage
Avoid conflating real value with fake
Encapsulate 1 reason to get to fog_storage
Conceal knowledge of Fog in Pipeline
Encapsulate pipeline#s3_url
Cleaned up bulk uploader spec
Introduce build_id to Bosh::Dev::Pipeline, reducing artifact collision