447848: IFormFieldInjection requires access to the parent field path 

Change-Id: Id63e31f8e3a453c5a627d8ae02177e6954236882
Task-Url: https://bugs.eclipse.org/bugs/show_bug.cgi?id=447848
Reviewed-on: https://git.eclipse.org/r/35118
Tested-by: Hudson CI
Reviewed-by: Andi Bur <andi.bur@gmail.com>