[td-225] change python script version.

tests/pytest/crash_gen.sh

@@ -49,4 +49,4 @@ export PYTHONPATH=$(pwd)/../../src/connector/python/linux/python3
 export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$LIB_DIR
 
 # Now we are all let, and let's see if we can find a crash. Note we pass all params
-python3.8 ./crash_gen.py $@
+python3 ./crash_gen.py $@