Support multi-row insert

[nakamura-to]

This pull request supports multi-row insert.

Using multi-row insert, you can issue the following SQL:

insert into DEPARTMENT (DEPARTMENT_ID, DEPARTMENT_NO, DEPARTMENT_NAME, LOCATION, VERSION) 
values (99, 99, 'aaa', 'bbb', 1), (100, 100, 'ccc', 'ddd', 1)

The Dao definition can be written as follows:

@Dao
public interface DepartmentDao {
  @MultiInsert
  int insertMutableEntities(List<Department> entities);

  @MultiInsert
  MultiResult<ImmutableDepartment> insertImmutableEntities(List<ImmutableDepartment> entities);
}

In the Criteria API, you can execute a multi-row insert by calling the insertMulti method as follows:

Department_ d = new Department_();
List<Department> departments = Arrays.asList(department, department2);
MultiResult<Department> result = entityql.insertMulti(d, departments).execute();

The databases that support this feature are as follows:

• H2
• MySQL 5
• MySQL 8
• PostgreSQL
• SQL Server

However, in the case of SQL Server, this feature cannot be executed on tables with an auto-increment primary key.