upgrade changelog

Signed-off-by: gaort <rutong.grt@alibaba-inc.com>

ChangeLog.txt

@@ -1,20 +1,9 @@
-2018-03-16 Version: 1.2.4
+2018-03-16 Version: 1.2.6
 1, Update GetQuotaInstance API.
 
-2018-03-16 Version: 1.2.4
+2018-03-16 Version: 1.2.5
 1, Synchronize to the latest api list
 
-2018-03-15 Version: 1.2.4
-1, Synchronize to the latest api list
-
-2018-03-15 Version: 1.2.4
-1, Synchronize to the latest api list
-
-2018-03-15 Version: 1.2.4
-1, Synchronize to the latest api list
-
-2018-03-15 Version: 1.2.4
-1, Synchronize to the latest api list
 
 2018-03-15 Version: 1.2.4
 1, Add QueryCustomerSaleInfo API.