Window functions tests are non-deterministic (prone to sporadic failures)

CURRENT_TEST: main.win

--- /data/bld/10.2/mysql-test/r/win.result	2016-09-21 18:52:27.000000000 +0300

+++ /data/bld/10.2/mysql-test/r/win.reject	2016-09-22 00:01:47.668443074 +0300

@@ -86,10 +86,10 @@

 2	0	1

 3	1	3

 4	1	3

-8	2	5

 5	2	5

 6	2	5

 7	2	5

+8	2	5

 9	4	9

 10	4	9

 select pk, a, rank() over (order by a desc) from t2;

@@ -98,10 +98,10 @@

 2	0	9

 3	1	7

 4	1	7

-8	2	3

 5	2	3

 6	2	3

 7	2	3

+8	2	3

 9	4	1

 10	4	1

 drop table t2;