Fix request parsing

Author: Inbal Tako

securenative/context/context_builder.py

@@ -48,7 +48,7 @@ def from_http_request(request):
             client_token = None
 
         try:
-            headers = request.headers
+            headers = dict(request.headers)
         except Exception:
             headers = None
 

securenative/event_manager.py

@@ -145,7 +145,7 @@ def serialize(obj):
                 "remoteIp": obj.request.remote_ip if obj.request else "",
                 "method": obj.request.method if obj.request else "",
                 "url": obj.request.url if obj.request else "",
-                "headers": dict(obj.request.headers) if obj.request else None
+                "headers": obj.request.headers if obj.request else None
             },
             "timestamp": obj.timestamp,
             "properties": obj.properties,