Add name/version if not specified

[peterbroadhurst]

In recent changes, the name/version of the FFI have become required, and this means that the API for /generate has changed behavior so it fails if these are not supplied

[awrichar]

Follow-on to #1432

[nguyer]

@awrichar I think you accidentally linked to this PR where you said this was a follow-on to something else.

Haven't name and version always been required? For as long as I can remember I've always needed to take the output from /contracts/interfaces/generate and manually add a name and version if I didn't specify one in the original request before doing the POST to contracts/interfaces to create the FFI.

Do we have a link to what changed previously that requires this change now?

[nguyer]

Okay after reading a bit more I realize that we now require a name and a version on /contracts/interfaces/generate which is somewhat new. This change makes those optional again (restoring existing behavior) by automatically filling them in with some default values. Sounds good to me.