
Cinder has supported to query project id of volume and snapshot, for consistency, this will introduce backup project attribute in querying operation. APIImpact Add 'os-backup-project-attr:project_id: xxxx' in querying response. Implements: blueprint: backup-tenant-attribute-support Change-Id: I6fde17baffe88ab4d4e69dcc2fefdbcb8d7a4dc5