PDI-10921: Failures in simple mappings do not cause the parent transformation to fail

There are fix and unit tests.
PDI-10877 - Table input step returns no data when pulling a timestamp
column from IBM Netezza

junit tests added
PDI-10877 - Table input step returns no data when pulling a timestamp
column from IBM Netezza

Fix provided
Merge pull request #285 from TatsianaKasiankova/PDI-10921

PDI-10921: Failures in simple mappings do not cause the parent transform...
Merge pull request #267 from prakapenka/PDI-10877

PDI-10877 - Table input step returns no data when pulling a timestamp column from IBM Netezza.