updates per feedback

Author: xiangyan99

sdk/core/azure-core/azure/core/pipeline/transport/_base.py

@@ -223,8 +223,8 @@ def __repr__(self):
 
     def __deepcopy__(self, memo=None):
         try:
-            data = copy.deepcopy(self.body)
-            files = copy.deepcopy(self.files)
+            data = copy.deepcopy(self.body, memo)
+            files = copy.deepcopy(self.files, memo)
             return HttpRequest(self.method, self.url, self.headers, files, data)
         except ValueError:
             return copy.copy(self)

sdk/core/azure-core/tests/test_universal_pipeline.py

@@ -72,6 +72,9 @@ def __deepcopy__(self, memodict={}):
 
     body = Non_deep_copiable()
     request = HttpRequest('GET', 'http://127.0.0.1/')
+    request.headers = {
+        'user-agent': 'test_request_history'
+    }
     request.body = body
     request_history = RequestHistory(request)
     assert request_history.http_request.headers == request.headers