According to our documentation, the user is never asked for confirmation
if addreviewer.maxWithoutConfirmation is set to 0. This is correctly
implemented in ReviewerAdder. PolyGerrit, though, never uses the logic
in ReviewerAdder but instead relies on the value of
SuggestedReviewerInfo.confirm for determining whether to show a
confirmation dialog.
As SuggestedReviewerInfo.confirm was filled with true even when
addreviewer.maxWithoutConfirmation was set to 0, this resulted in
PolyGerrit showing a confirmation dialog even though it shouldn't.
Fix this behavior by correctly filling SuggestedReviewerInfo.confirm.
Change-Id: I11e466f3fc260db4ff7167aa64c09148da314d02