Disable warnings for 'drop if exists' and 'create if not exist' commands

mysql-test/columnstore/devregression/t/mcs7162_regression_bug5044.test

@@ -8,11 +8,17 @@
 #
 USE tpch1;
 #
+--disable_warnings
 create table if not exists casetest (id int, c1 int, c2 int, c3 int) engine=columnstore;
+--enable_warnings
+
 insert into casetest values (1, 1, 1, 1), (2, null, null, null), (3, 1, 1, null), (4, 1, null, null);
 select id, case when c1 is not null and c2 is not null and c3 is not null then 'A' when c1 is not null and c2 is 
 not null and c3 is null then 'B' when c1 is not null and c2 is null and c3 is not null then 'C' when c1 is not null 
 and c2 is null and c3 is null then 'D' end case_func from casetest;
+
+--disable_warnings
 drop table casetest;
+--enable_warnings
 #