The autocompletion for form type options should look at parent classes too (in case the parent method is called)

[stof]

This is necessary for the entity type for instance, given that options are actually configured in the parent abstract class DoctrineType sharing logic between the different Doctrine projects.

[Haehnchen]

EntityType does not overwrite configureOptions, so in this case phpstorm api provides most parent method which is the one from DoctrineType. moreover there is a "parent::*" parser currently. this issue will resolve with #491, because of renamed setDefaultOptions