Add CASCADE to DROP SCHEMA in PostgreSQL tests

Without CASCADE (i.e. RESTRICT), the schema won't be deleted.
https://www.postgresql.org/docs/current/sql-dropschema.html

Author: harawata

src/test/java/org/apache/ibatis/submitted/keycolumn/CreateDB.sql

@@ -14,7 +14,7 @@
 --    limitations under the License.
 --
 
-DROP SCHEMA IF EXISTS mbtest;
+DROP SCHEMA IF EXISTS mbtest CASCADE;
 
 CREATE SCHEMA mbtest;
 

src/test/java/org/apache/ibatis/submitted/multiple_resultsets/CreateDB.sql

@@ -14,7 +14,7 @@
 --    limitations under the License.
 --
 
-DROP SCHEMA IF EXISTS mbtest;
+DROP SCHEMA IF EXISTS mbtest CASCADE;
 
 CREATE SCHEMA mbtest;
 

src/test/java/org/apache/ibatis/submitted/refcursor/CreateDB.sql

@@ -14,7 +14,7 @@
 --    limitations under the License.
 --
 
-DROP SCHEMA IF EXISTS mbtest;
+DROP SCHEMA IF EXISTS mbtest CASCADE;
 
 CREATE SCHEMA mbtest;
 

src/test/java/org/apache/ibatis/submitted/sql/CreateDB.sql

@@ -14,7 +14,7 @@
 --    limitations under the License.
 --
 
-DROP SCHEMA IF EXISTS mbtest;
+DROP SCHEMA IF EXISTS mbtest CASCADE;
 
 CREATE SCHEMA mbtest;
 

src/test/java/org/apache/ibatis/type/SqlxmlTypeHandlerTest.sql

@@ -14,7 +14,7 @@
 --    limitations under the License.
 --
 
-DROP SCHEMA IF EXISTS mbtest;
+DROP SCHEMA IF EXISTS mbtest CASCADE;
 
 CREATE SCHEMA mbtest;