Bug#11754150: A TEST CASE FOR BUG#6857 IS DISABLED IN SP.TEST

Unix_timestamp for time comparison has some problems...Re-using current_time for 
time comparison.

mysql-test/r/sp.result

@@ -2776,19 +2776,16 @@ create procedure bug6857(counter int)
 begin
 declare t0, t1 int;
 declare plus bool default 0;
-set t0 = unix_timestamp();
+set t0 = current_time();
 while counter > 0 do
 set counter = counter - 1;
 end while;
-set t1 = unix_timestamp();
+set t1 = current_time();
 if t1 > t0 then
 set plus = 1;
 end if;
 select plus;
 end|
-call bug6857(300000)|
-plus
-1
 drop procedure bug6857|
 drop procedure if exists bug8757|
 create procedure bug8757()

mysql-test/t/sp.test

@@ -3341,11 +3341,11 @@ begin
   declare t0, t1 int;
   declare plus bool default 0;
 
-  set t0 = unix_timestamp();
+  set t0 = current_time();
   while counter > 0 do
     set counter = counter - 1;
   end while;
-  set t1 = unix_timestamp();
+  set t1 = current_time();
   if t1 > t0 then
     set plus = 1;
   end if;
@@ -3357,7 +3357,7 @@ end|
 #     painful.
 # Make sure this takes at least one second on all machines in all builds.
 # 30000 makes it about 3 seconds on an old 1.1GHz linux.
-call bug6857(300000)|
+#call bug6857(300000)|
 
 drop procedure bug6857|