[zendframework/zf2#3735] Added unit test
[zendframework/zf2#3735] Added unit test

- Test demonstrates that factory composed by object implementing
  FormFactoryAwareInterface is not overwritten, but *is* injected with
  FormElementManager instance.

adamlundrigan/zend-form,zendframework/zend-form,marek-saji/zend-form,marek-saji/zend-form,svycka/zend-form,adamlundrigan/zend-form,akrabat/zend-form,svycka/zend-form,MadCat34/zend-form,MadCat34/zend-form,zendframework/zend-form,akrabat/zend-form