These tests are flaky because even though the care was taken to guess if
the ssh_channel_free() really freed the channel, it might not always be correct
and call to operation on the freed channel results in use after free.
Generally, no operation should be called after the channel is freed by the user.
Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
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