anchor.diff:  * **update** [Hash, optional]: Specific update settings for this instance group. Use this to override [global job update settings](#update) on a per-instance-group basis.
   * **migrated_from** [Array, optional]: Specific migration settings for this instance group. Use this to [rename and/or migrate instance groups](migrated-from.html).
   * **lifecycle** [String, optional]: Specifies the kind of workload the instance group represents. Valid values are `service` and `errand`; defaults to `service`. A `service` runs indefinitely and restarts if it fails. An `errand` starts with a manual trigger and does not restart if it fails.
  -* **properties** [Hash, optional]: Specifies job properties. Properties allow BOSH to configure jobs to a specific environment. `properties` defined in a Job block are accessible only to that job, and override any identically named global properties.
  +* **properties** [Hash, optional]: Specifies instance group properties. Deprecated in favor of job level properties and links.
   
   Example:
   
  
positive.code:   jobs:
    - name: redis-server
      release: redis
    vm_type: medium
    stemcell: default
    persistent_disk_type: medium
  
negative.code:   jobs:
    - name: redis-server
      release: redis
      properties:
        port: 3606
    vm_type: medium
    vm_extensions: [public-lbs]
    stemcell: default
  