gabbi: use history

gabbi supports grabbing historical queries. leverage that so we
don't need to make redundant requests to grab same data.

Change-Id: If89f864e995bcba41dc45e57f5dcc73f30cc4120
1 file changed
tree: 6a82e31824fe47dd761c2c65530a20eff3a79a8c
  1. ceilometer/