tests/fate-run: make FATE non-interactive

FATE is non-interactive; it should not listen to user commands

Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>

This should fix leaving the terminal in a messed up state with
zsh in case of crashes during fate

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
