Added RequestID property to the ErrorArgs, so that errors can be
associated to specific requests.
Removed migrations file.
Added client tests class.
RequestIDs are now set for real time data requests as well. Also,
changed the real time request reply protocol, which now returns the
entire request.
Added RequestID property to RealTimeDataRequest.
Made necessary changes to IDataClient interface to return RequestID when
a real time request is made.