Sample data from docs hard coded into SDK

[jeffsteinmetz]

at these 2 lines there is sample data hard coded into the message handlers:

https://github.com/Countly/countly-sdk-react-native/blob/master/Countly.js#L965
https://github.com/Countly/countly-sdk-react-native/blob/master/Countly.js#L722

The data should be passed through with exactly what was sent in from the sender, such as:

.setData(message.data);