Add project_id to backup response

Change-Id: I99fb3d0c7ea7036bbb622d86eef9f31e53065a0a

api-ref/source/backups.inc

@@ -53,6 +53,7 @@ Response Parameters
     - size: backup_size
     - status: backup_status
     - updated: updated
+    - project_id: project_uuid
 
 
 Response Example
@@ -116,6 +117,7 @@ Response Parameters
     - size: backup_size
     - status: backup_status
     - updated: updated
+    - project_id: project_uuid
 
 
 Response Example
@@ -164,6 +166,7 @@ Response Parameters
     - size: backup_size
     - status: backup_status
     - updated: updated
+    - project_id: project_uuid
 
 
 Response Example

api-ref/source/parameters.yaml

@@ -649,6 +649,12 @@ nics:
   in: body
   required: false
   type: array
+project_uuid:
+  description: |
+    The project ID of the resource.
+  in: body
+  required: true
+  type: string
 quota_in_use:
   description: |
     The used quota for a resource.

trove/backup/views.py

@@ -32,6 +32,7 @@ class BackupView(object):
                 "size": self.backup.size,
                 "status": self.backup.state,
                 "parent_id": self.backup.parent_id,
+                "project_id": self.backup.tenant_id
             }
         }
         if self.backup.datastore_version_id: