fetch the entire tree at once, stuff it all in the cache, and
then only read from the cache (don't read for real, since we want
negative cache effects as well)
Change-Id: I18bfca57dcbeb0c1bbfdc90d210ac8de9290d434
Reviewed-on: https://gerrit.instructure.com/138754
Tested-by: Jenkins
Reviewed-by: Rob Orton <rob@instructure.com>
Reviewed-by: Tyler Pickett <tpickett@instructure.com>
Product-Review: Cody Cutrer <cody@instructure.com>
QA-Review: Cody Cutrer <cody@instructure.com>