We should be aiming to keep our tests under 2 minutes so lets reduce
the default timeout to that. Tests that we know take longer should
explicitly set a longer timeout.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220914155950.804707-8-alex.bennee@linaro.org>