feat: add testcontainer as integration testing tool (arana-db#119)

* add testcontainer test code.

* Debug testcontainer test code.

* Fixes SQL file path.

* Optimize test code.

* Refactor testcontainer code.

* add blank at end of file.

* Format code.

* Refactor code, add struct.

* Fixes code review problem.

docker/scripts/sharding.sql

@@ -33,4 +33,6 @@ END
 
 DELIMITER ;
 CALL sp_create_tab;
-DROP PROCEDURE sp_create_tab;
+DROP PROCEDURE sp_create_tab;
+
+insert into student_0001 values (1, 1, 'scott', 95, 'nc_scott', 0, 16, now(), now());

go.mod

@@ -21,10 +21,11 @@ require (
 	github.com/rogpeppe/go-internal v1.8.0 // indirect
 	github.com/spf13/cobra v1.2.1
 	github.com/stretchr/testify v1.7.0
+	github.com/testcontainers/testcontainers-go v0.12.0
 	github.com/tidwall/gjson v1.14.0
 	go.etcd.io/etcd/server/v3 v3.5.0-alpha.0
 	go.uber.org/atomic v1.9.0
 	go.uber.org/zap v1.19.1
-	golang.org/x/net v0.0.0-20211105192438-b53810dc28af
+	golang.org/x/net v0.0.0-20211108170745-6635138e15ea
 	golang.org/x/sync v0.0.0-20210220032951-036812b2e83c
 )