All the Placement API stats "total" show the actual amount of the
resource that the provider can accommodate. Using allocation ratio
it is possible to exceed physical constraints.
This patch uses allocation ratios to display the diagrams properly
and adds the data to the stats table.
Closes-Bug: #1974470
Closes-Bug: #1397917
Change-Id: Iab0ce21ae63f4cc26d3ec5684615189b8ab35231