[SP-383] - Patch request for PDI-10270 - 'Checks if files exist' or 'Check if a folder is empty': PDI Server logs with error from Quartz even though the job finishes successfully (4.8)

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[SP-383] - Patch request for PDI-10270 - 'Checks if files exist' or 'Check if a folder is empty': PDI Server logs with error from Quartz even though the job finishes successfully (4.8)

backport of the original fix from master. unit tests are not included due to significant changes in directory structure.
Merge pull request #422 from mtseu/sp-383

SP-383 - Patch request for PDI-10270