Add FormElementManager in AnnotationBuilderFactory

In the AnnotationBuilderFactory the FormFactory will be now created with the FormElementManager injected. This way you can use your custom hydrators, validators, filters, and so on in your annotations. Also the "@Form\Hydrator("DoctrineModule\Stdlib\Hydrator\DoctrineObject")" annotation work now out of the box.
add new lines for better formatting
make getFormFactory private
add annotationbuilderfactorytest
cleanup in test
Renamed test to match tested unit name
Adding `@group` annotation referencing #352
#352 - adding coverage annotations
Merge branch 'hotfix/#352-assign-form-element-manager-to-annotation-builder-factory'

Close #352