[MERGE #2104 @dilijev] Update ChakraCore version to 2.0 in branch release/2.0-pre; also verify CI configuration.
[MERGE #2104 @dilijev] Update ChakraCore version to 2.0 in branch release/2.0-pre; also verify CI configuration.

Merge pull request #2104 from dilijev:v200

mrkmarron/ChakraCore,mrkmarron/ChakraCore,mrkmarron/ChakraCore,Microsoft/ChakraCore,mrkmarron/ChakraCore,mrkmarron/ChakraCore,mrkmarron/ChakraCore,Microsoft/ChakraCore,Microsoft/ChakraCore,mrkmarron/ChakraCore,Microsoft/ChakraCore,Microsoft/ChakraCore,Microsoft/ChakraCore