PDO tests factory

need to use Factory class for creating PDO objects.

instead of $this->db = new \PDO('mysql:dbname=moa', 'travis');
need write $this->db = PDOFactory::GetInstance();

and use something like this:

class PDOFactory{
static function GetInstance(){
return new \PDO('mysql:dbname=moa', 'travis');
}
}

And connection credentials will be saved on only one file instead of all tests .

No file or test path is named. Find the tests that instantiate PDO with the shown MySQL connection, centralize their credentials through a PDOFactory, and verify that the test suite still connects successfully.

Written by the indexing model from the issue text.