Applying Changes from pipeline-templates   Commit ID: 0e8fd73a99d7c5539ac678ee4371762989573535   Committed: Thu, 21 Sep 2017 15:57:55 +1000 By Dr Nic Williams
Applying Changes from pipeline-templates
  Commit ID: 0e8fd73a99d7c5539ac678ee4371762989573535
  Committed: Thu, 21 Sep 2017 15:57:55 +1000 By Dr Nic Williams

only set an instance_group's persistent_disk_type if its already using it

starkandwayne/canary-boshrelease,starkandwayne/canary-boshrelease