Added sac configuration parameter. (Stop At Crash)
set #.UT.sac ← 0 to not stop the test execution on crahs
set #.UT.sac ← 1 to stop at crash and be able to enter the code.
        ⍝ when fixing
        ⍝ and done
        ⍝ →⎕LC
        ⍝ todo set default value for stop_at_crash