validateAllReachesEveryOneOfTodaysSixValidators only covered six of
the eight real validators; the new validator was reachability-tested
only from FleetConfigTest, in a different file from the one whose job
is to enumerate every validateAll-reachability case.
Add the pane-placement case to the enumeration, rename the method to
drop the hardcoded count (validateAllReachesEveryOneOfTodaysRealValidators),
and correct the surrounding claims to say seven of eight, naming
validateLeadRollover as the one case still missing (fleetd #668, not
fixed here).
Dai Ha
656588f597