Add spec helper method to create auditor for space

Change-Id: I2fbf09c6de310972c5fc0060f9cd8c00fb91abd3
Add space auditor permission for stats api.

Change-Id: Ia5f50aff5c1c1a655eb445d851c0ba8bca4df240
Merge "Add spec helper method to create auditor for space"
Merge "Add space auditor permission for stats api."
Make bin/setup_yeti use 'yeti' quota.

Change-Id: If3183a852d6cfb9eb8efd7311cb6db1f0ee99465