Code+tests to handle invalid timestamps from the Alexa test console#3

Open

andyhopp wants to merge 1 commit intotimheuer:masterfrom

andyhopp:invalid-timestamp-workaround

Commits on Jul 13, 2017

Added code to handle invalid timestamps from within the Alexa testing console. Added unit tests for Core framework and included test for new code.
andyhopp
committed