[BASOP CI] fix enc passthrough test
Update of the test_enc_passthrough.py to make it more stable and easier to configure. The test was showing different number of test cases, possibly due to the check of existence of the input file during execution.
Update of the test_enc_passthrough.py to make it more stable and easier to configure. The test was showing different number of test cases, possibly due to the check of existence of the input file during execution.