fix: Update localmode code to decode urllib response as UTF8

Author: navinsoni

src/sagemaker/local/entities.py

@@ -314,7 +314,7 @@ def start(self, input_data, output_data, transform_resources, **kwargs):
         endpoint_url = "http://%s:%d/execution-parameters" % (get_docker_host(), serving_port)
         response, code = _perform_request(endpoint_url)
         if code == 200:
-            execution_parameters = json.loads(response.read())
+            execution_parameters = json.loads(response)
             # MaxConcurrentTransforms is ignored because we currently only support 1
             for setting in ("BatchStrategy", "MaxPayloadInMB"):
                 if setting not in kwargs and setting in execution_parameters:
@@ -643,8 +643,9 @@ def _perform_request(endpoint_url, pool_manager=None):
     """Placeholder docstring."""
     http = pool_manager or urllib3.PoolManager()
     try:
-        r = http.request("GET", endpoint_url)
-        code = r.status
+        ret = http.request("GET", endpoint_url)
+        r = ret.data.decode('utf-8')
+        code = ret.status
     except urllib3.exceptions.RequestError:
         return None, -1
     return r, code