TESTS: change the function signatures for the helpers

Signed-off-by: Ronnie Sahlberg <ronniesahlberg@gmail.com>

test-tool/test_writesame16_unmap_vpd.c

@@ -43,7 +43,7 @@ test_writesame16_unmap_vpd(void)
 
 	logging(LOG_VERBOSE, "Unmap 1 block using WRITESAME16");
 	memset(buf, 0, block_size);
-	ret = writesame16(sd->iscsi_ctx, sd->iscsi_lun, 0,
+	ret = writesame16(sd, 0,
 			  block_size, 1, 0, 1, 0, 0, buf,
 			  EXPECT_STATUS_GOOD);
 	if (ret != 0) {