Revive ByteArrayModelBinder

[kevinchalet]

MVC vPrevious (:trollface:) was able to bind byte[] properties thanks to its special ByteArrayModelBinder.

In MVC 6, ByteArrayModelBinder has not been ported yet and byte[] properties cannot be bound correctly: the bytes array is instantiated but its length is incorrect (always 1) and doesn't reflect the base64-encoded string created by the HTML helpers and retrieved by the value providers.

Please consider porting ByteArrayModelBinder.

[sornaks]

Checked in: 9c4d780

[davidfowl]

This doesn't have a bug/feature tag @yishaigalatzer @danroth27

[yishaigalatzer]

Thanks @pranavkm