Bulk Import job status not changed after activation

[volodymyr-korzh]

To Reproduce

1. Create BulkImportJob
2. Mark job As ready for activation
3. Activate BulkImportJob

Expected behaviour
BulkImportJob status changed to RUNNING. Activating ready jobs again doesn't trigger new job.

Expected behaviour
BulkImportJob status stays READY. Activating ready jobs again triggers new job.

BulkImportJobJson job = new BulkImportJobJson();
job.setProcessingMode(JobFileRowProcessingModeEnum.FHIR_TRANSACTION);
job.setJobDescription("testFlow_TransactionRows");
job.setBatchSize(3);
String jobId = bulkDataImportSvc.createNewJob(job, files);
bulkDataImportSvc.markJobAsReadyForActivation(jobId);

ActivateJobResult activateJobOutcome = bulkDataImportSvc.activateNextReadyJob();
assertTrue(activateJobOutcome.isActivated);
// validate that job changed status from READY to RUNNING
assertEquals(BulkImportJobStatusEnum.RUNNING, bulkDataImportSvc.getJobStatus(jobId).getStatus());