autoupdate: Use correct nebraska.Request attributes

event_type and event_results are properties of RequestApp not the
Request itself. This patch fixes it.

BUG=chromium:1014807
TEST=devserver_integration_test.py

Change-Id: Ic0847ea198a4b0058c0e8cd46bd1c5e2f8d3ccc6
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/dev-util/+/1864310
Tested-by: Amin Hassani <[email protected]>
Auto-Submit: Amin Hassani <[email protected]>
Reviewed-by: Keith Haddow <[email protected]>
Commit-Queue: Keith Haddow <[email protected]>
1 file changed