TNO/knowledge-engine: 0.1.6

Stability improvements:

• REST API requests to proactive interactions (POST & ASK) now don't synchronously wait for the smart connector's results anymore, so it should block fewer threads.
• After POSTing an invalid handle response to /sc/handle, you are now able to try again, with the same handleRequestId. Furthermore, the corresponding future is now also not forgotten, resulting in better stability.
• When deleting a RestKnowledgeBase, any handle request that it was still supposed to respond to are now properly cancelled.
• Increased thread pool from 4 to 12 threads.

Validation improvements:

• The requirement for knowledgeBaseId in handle responses is now enforced.
• A list of bindings in handle responses are now not allowed to contain null values anymore.