Convert object from Time to Int as required by DynamoDB.  Fixes "unsupported type, expected Hash, Array, Set, String, Numeric, IO, true, false, or nil, got Time" error.
Convert object from Time to Int as required by DynamoDB.  Fixes "unsupported type, expected Hash, Array, Set, String, Numeric, IO, true, false, or nil, got Time" error.

awslabs/eb-locustio-sample,awslabs/eb-locustio-sample