Added tracing for requests

cnn_classification_service/classifier_cache.py

@@ -1,6 +1,8 @@
 #!/usr/bin/env python3
 import os
 import logging
+from requests_opentracing import SessionTracing
+import opentracing  # ez kell ide hogy a session tracer jolegyen
 import requests
 import tempfile
 from typing import Tuple
@@ -18,7 +20,7 @@ class ClassifierCache:
         self._current_classifier = None  # Latest classifier is a classifier that uses the $default model
         self._downloaded_files = []
 
-        self._session = requests.Session()
+        self._session = SessionTracing(propagate=True)
 
     def _cleanup(self):
         self._current_classifier = None