Login: dont fail the login just because there is no media in a device

in that case we will never reach test unit ready being successful since it will fail with NOT_READY/MEDIUM_NOT_PRESENT.
Treat this sense code as a successful login as far as the login process is concerned

lib/connect.c

@@ -63,6 +63,13 @@ iscsi_testunitready_cb(struct iscsi_context *iscsi, int status,
 		}
 	}
 
+	/* Dont fail the login just because there is no medium in the device */
+	if (status != 0
+	&& task->sense.key == SCSI_SENSE_NOT_READY
+	&& task->sense.ascq == SCSI_SENSE_ASCQ_MEDIUM_NOT_PRESENT) {
+		status = 0;
+	}
+
 	ct->cb(iscsi, status?SCSI_STATUS_ERROR:SCSI_STATUS_GOOD, NULL,
 	       ct->private_data);
 	free(ct);