Some pandas io tests hang when run sequentially, put pass when run individually. One just hangs

[radhikaj]

/usr/local/lib/python3.9/site-packages/pandas/tests/io/test_user_agent.py hangs when run with run-one The following tests pass when run individually, but hang when run sequentially /usr/local/lib/python3.9/site-packages/pandas/tests/io/test_stata.py /usr/local/lib/python3.9/site-packages/pandas/tests/io/test_sql.py /usr/local/lib/python3.9/site-packages/pandas/tests/io/test_pickle.py /usr/local/lib/python3.9/site-packages/pandas/tests/io/test_html.py /usr/local/lib/python3.9/site-packages/pandas/tests/io/test_s3.py /usr/local/lib/python3.9/site-packages/pandas/tests/io/test_common.py /usr/local/lib/python3.9/site-packages/pandas/tests/io/test_gcs.py /usr/local/lib/python3.9/site-packages/pandas/tests/io/test_fsspec.py /usr/local/lib/python3.9/site-packages/pandas/tests/io/test_date_converters.py /usr/local/lib/python3.9/site-packages/pandas/tests/io/test_compression.py /usr/local/lib/python3.9/site-packages/pandas/tests/internals/test_managers.py

See PR https://github.com/deislabs/mystikos/pull/1192 for more details