patch 9.0.1570: some tests are slow

Problem:    Some tests are slow.
Solution:   Make a few test cases faster.
diff --git a/src/version.c b/src/version.c
index f7ea30f..07fec75 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1570,
+/**/
     1569,
 /**/
     1568,