Document how to use AWS IAM profiles for object storage
Due to https://github.com/fog/fog-aws/issues/162, fog-aws requires a blank AWS access key and ID to make IAM profiles work with object storage.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Due to https://github.com/fog/fog-aws/issues/162, fog-aws requires a blank AWS access key and ID to make IAM profiles work with object storage.