Return parallel execution to 1 and adjust modulo for deterministic te…

…st runs

Signed-off-by: elronbandel <[email protected]>

tests/catalog/test_preparation.py

@@ -25,12 +25,12 @@
 # Make sure the order in which the tests are run is deterministic
 # Having a different order for local testing and github testing may cause diffs in results.
 all_preparation_files.sort()
-num_par = 8  # num of parallel executions
+num_par = 1  # num of parallel executions
 logger.critical(
     f"Over all, {len(all_preparation_files)} files will now be tested over {num_par} parallel processes."
 )
 # the following should be any of modulo num_par: 0,1,2,3,4,5,6,7,8,.. num_par-1
-modulo = 2
+modulo = 0
 all_preparation_files = [
     file for i, file in enumerate(all_preparation_files) if i % num_par == modulo
 ]