adding timestamp of event being sent

Author: prateeksachan

tracereq/transport.py

@@ -40,6 +40,7 @@ def __init__(self, token, dest):
 
     def send(self, trace_doc):
         try:
+            trace_doc['timestamp'] = datetime.utcnow()
             self.session.request(
                 'POST',
                 self.dest,