Attempts affect pre failures.
This means we can increase stability of jobs by rejecting nodes
that fail pre without failing runs at the same time (unless we
are really unlucky and hit b0rken nodes 5 times in a row).
Change-Id: I17b7f878c742fa8db66f738526855a02ab9f1905
(cherry picked from commit f3f4a93e3bc80951bfe6deb00abcb11c34ce9830)
713c75f073