Fix continuous batching unit test

[mreso]

Description

This PR fixes a test related to continuous batching

Fixes #(issue)

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)

Feature/Issue validation/testing

Please describe the Unit or Integration tests that you ran to verify your changes and relevant result summary. Provide instructions so it can be reproduced.
Please also list any relevant details for your test configuration.

• pytest test/pytest/test_continuous_batching.py

============================================================================================================== warnings summary ==============================================================================================================
ts/torch_handler/base_handler.py:13
  /home/ubuntu/serve/ts/torch_handler/base_handler.py:13: DeprecationWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html
    from pkg_resources import packaging

../miniconda3/envs/serve2/lib/python3.10/site-packages/pkg_resources/__init__.py:2871
../miniconda3/envs/serve2/lib/python3.10/site-packages/pkg_resources/__init__.py:2871
  /home/ubuntu/miniconda3/envs/serve2/lib/python3.10/site-packages/pkg_resources/__init__.py:2871: DeprecationWarning: Deprecated call to `pkg_resources.declare_namespace('ruamel')`.
  Implementing implicit namespace packages (as specified in PEP 420) is preferred to `pkg_resources.declare_namespace`. See https://setuptools.pypa.io/en/latest/references/keywords.html#keyword-namespace-packages
    declare_namespace(pkg)

-- Docs: https://docs.pytest.org/en/stable/how-to/capture-warnings.html
======================================================================================================= 3 passed, 3 warnings in 11.48s =======================================================================================================

Checklist:

• Did you have fun?
• Have you added tests that prove your fix is effective or that this feature works?