Add a test for: a column change: data type + comment + position; all 3 are changed 

Pulled from https://github.com/php-openapi/yii2-openapi/issues/58.

This can be done after https://github.com/php-openapi/yii2-openapi/pull/59 and https://github.com/php-openapi/yii2-openapi/pull/61 is merged