fluster-on-chromeos: Simplify ssh between client and dut #2721
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Cosmetic change - Simplify
ssh
connection between client and DUT by setting the/root/.ssh/config
to avoid using-o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -i /home/cros/.ssh/id_rsa
flags on every connection to improve code readability.Keeps only the first
ssh
connection flags which waits until the DUT to be available.