Ran into an issue where the `test_chat_bedrock_streaming_generation_i…

…nfo` test would occasionally fail (returned "Hello! How are you doing?" one time)

libs/aws/tests/integration_tests/chat_models/test_bedrock.py

@@ -111,6 +111,7 @@ def on_llm_end(
     chat = ChatBedrock(  # type: ignore[call-arg]
         model_id="anthropic.claude-v2",
         callbacks=[callback],
+        model_kwargs={"temperature": 0},
     )
     list(chat.stream("hi"))
     generation = callback.saved_things["generation"]