Fix data converter ToPayload error management

[cedricmoulard]

What was changed

Returns error is codec encode method error in ToPayload

Why?

If codec failed to encode data, the error was silent and the non-encoded payload was return. An error management is missing because an error was expected in this case.

Checklist

1. Closes DataConverter silent all encoding error #1999

2. How was this tested: unit test

3. Any docs updates needed? No

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[Quinn-With-Two-Ns]

I think this LGTM, what do you think @yuandrew ?

[yuandrew]

LGTM