Fix milvus test Error: 'NameError: name 'MockConfig' is not defined'

[wangxuqi]

Background

After minimall add pytest (#1859) merged. The test case is not worked. Try to fix it.

=================================== FAILURES ===================================
__________________________ TestMilvusMemory.test_add ___________________________

self = <tests.milvus_memory_test.TestMilvusMemory testMethod=test_add>

    def setUp(self) -> None:
        """Set up the test environment"""
>       self.cfg = MockConfig()
E       NameError: name 'MockConfig' is not defined

Changes

call correct mock_config(), not MockConfig()

Test Plan

============================= test session starts ==============================
collecting ... collected 5 items

milvus_memory_test.py::TestMilvusMemory::test_add 
milvus_memory_test.py::TestMilvusMemory::test_clear 
milvus_memory_test.py::TestMilvusMemory::test_get 
milvus_memory_test.py::TestMilvusMemory::test_get_relevant 
milvus_memory_test.py::TestMilvusMemory::test_get_stats 

============================== 5 passed in 20.20s ==============================

PR Quality Checklist

• My pull request is atomic and focuses on a single change.
• I have thoroughly tested my changes with multiple different prompts.
• I have considered potential risks and mitigations for my changes.
• I have documented my changes clearly and comprehensively.
• I have not snuck in any "extra" small tweaks changes