* Fix the sync api returning an empty sync response when reaching timeout, regardless of the since token
* Declare syncData from the start to avoid declaration shadowing
* Bump Kafka version
Since this is a huge bump, it might completely blow up - I'll revert it if that's the case
* Put the loop and the IsEmpty() check back in sync handler
* Add doc and allow returning if timeout is reached
Brendan Abolivier
Richard van der Hoff
Erik Johnston