kodo: Use recoder in TestIsPartialComplete

When using on-the-fly encoding and partial decoding, the result should
be correct no matter if a recoder is used or not.

This patch adds a recoder to the test of partial decoding and recodes
packets with 50% probability.

Signed-off-by: Martin Hundebøll <m.hundeboll@gmail.com>
Signed-off-to: Steinwurf ApS
Fixing issue with partial complete and recoding
Add missing file
Improved partial decoding tracker implementation
Add unit tests
Updating comments
Updating news