test(e2e): stabilize Mistral required streaming (#1483)

Signed-off-by: Chang Su <8605658+CatherineSue@users.noreply.github.com>

Author: CatherineSue

e2e_test/chat_completions/test_function_calling.py

@@ -1055,6 +1055,7 @@ def test_tool_choice_required_streaming(self, model, api_client):
             model=model,
             messages=messages,
             max_tokens=2048,
+            temperature=0.1,
             tools=tools,
             tool_choice="required",
             stream=True,