Add hasColumn/hasColumns

[Alex-Belyi]

Currently both methods just return true;

 /** @inheritdoc */
    public function hasColumn($table, $column)
    {
        return true;
    }

    /** @inheritdoc */
    public function hasColumns($table, array $columns)
    {
        return true;
    }

[Alex-Belyi]

solution provided here
#3001

[GromNaN]

Fixed by #3001