deployments under traffic and mirror traffic should be lowercase (Azure#28715)

Co-authored-by: Nancy Mejia Juarez <namejia@microsoft.com>

Author: nancy-mejia

sdk/ml/azure-ai-ml/azure/ai/ml/operations/_online_endpoint_operations.py

@@ -43,7 +43,7 @@
 
 
 def _strip_zeroes_from_traffic(traffic: Dict[str, str]) -> Dict[str, str]:
-    return {k: v for k, v in traffic.items() if v and int(v) != 0}
+    return {k.lower(): v for k, v in traffic.items() if v and int(v) != 0}
 
 
 class OnlineEndpointOperations(_ScopeDependentOperations):

sdk/ml/azure-ai-ml/tests/online_services/unittests/test_online_endpoints.py

@@ -445,6 +445,7 @@ def test_regenerate_invalid_key_type(
         pytest.param({"blue": "100", "green": "0"}, {"blue": "100"}),
         pytest.param({"green": "0"}, {}),
         pytest.param({}, {}),
+        pytest.param({"blue": "10", "GREEN": "90"}, {"blue": "10", "green": "90"}),
     ],
 )
 def test_strip_traffic_from_traffic_map(traffic, expected_traffic) -> None: