create celery worker with inference worker profile (#327)

* create celery worker with inference worker

* try get aws profile

Author: saiatmakuri

model-engine/model_engine_server/core/celery/app.py

@@ -504,7 +504,8 @@ def _get_backend_url_and_conf(
     elif backend_protocol == "s3":
         backend_url = "s3://"
         if aws_role is None:
-            aws_session = session(infra_config().profile_ml_worker)
+            aws_profile = os.getenv("AWS_PROFILE", infra_config().profile_ml_worker)
+            aws_session = session(aws_profile)
         else:
             aws_session = session(aws_role)
         out_conf_changes.update(