Introduce a new --exact-order switch to disable all sorting, filtering
of repeated lines, and shuffling of test order. The goal of this is to
be able to run tests in a specific order, namely to try to reproduce
test failures that could be the result of a -r(andomize) run getting
lucky.
Signed-off-by: Darrick J. Wong <djwong@kernel.org> Reviewed-by: Brian Foster <bfoster@redhat.com> Signed-off-by: Eryu Guan <guaneryu@gmail.com>