Annotation processor doesn't use full inheritance

[EvanKirshenbaum]

[imported from HPE issue 334]

There are several places in the annotation processor in which Abraham asked questions about the schema interface's parent (e.g., "Does it have a method with this name and signature?") but as near as I can tell, this only takes into account the methods and fields explicitly defined in that parent and ignores any that are inherited from its parent.

This needs to be generalized to do the right thing with deeper hierarchies.