Added database nodes cleanup on errors.

Signed-off-by: Cristiano Urban <cristiano.urban@inaf.it>

transfer_service/import_executor.py

@@ -234,6 +234,9 @@ class ImportExecutor(TaskExecutor):
                 self.jobObj.setEndTime(datetime.datetime.now().isoformat())
                 self.dbConn.insertJob(self.jobObj)
                 self.logger.info("Job phase updated to ERROR.")
+                self.logger.info("Removing VOSpace nodes from the database...")
+                self.dbConn.deleteNodesByJobId(self.jobId)
+                self.logger.info("Database cleanup completed")
 
                 msg = f"""
         ########## VOSpace import procedure summary ##########