[Packaging][Python] Missing pytest dependency from conda and wheel builds

Failed Tasks:
- conda-osx-clang-py36:
  URL: https://github.com/ursa-labs/crossbow/branches/all?query=nightly-2019-10-02-0-azure-conda-osx-clang-py36
- conda-osx-clang-py37:
  URL: https://github.com/ursa-labs/crossbow/branches/all?query=nightly-2019-10-02-0-azure-conda-osx-clang-py37
- conda-win-vs2015-py36:
  URL: https://github.com/ursa-labs/crossbow/branches/all?query=nightly-2019-10-02-0-azure-conda-win-vs2015-py36
- wheel-manylinux1-cp27mu:
  URL: https://github.com/ursa-labs/crossbow/branches/all?query=nightly-2019-10-02-0-travis-wheel-manylinux1-cp27mu
- conda-linux-gcc-py27:
  URL: https://github.com/ursa-labs/crossbow/branches/all?query=nightly-2019-10-02-0-azure-conda-linux-gcc-py27
- wheel-osx-cp27m:
  URL: https://github.com/ursa-labs/crossbow/branches/all?query=nightly-2019-10-02-0-travis-wheel-osx-cp27m
- docker-spark-integration:
  URL: https://github.com/ursa-labs/crossbow/branches/all?query=nightly-2019-10-02-0-circle-docker-spark-integration
- wheel-win-cp35m:
  URL: https://github.com/ursa-labs/crossbow/branches/all?query=nightly-2019-10-02-0-appveyor-wheel-win-cp35m
- conda-win-vs2015-py37:
  URL: https://github.com/ursa-labs/crossbow/branches/all?query=nightly-2019-10-02-0-azure-conda-win-vs2015-py37
- conda-linux-gcc-py37:
  URL: https://github.com/ursa-labs/crossbow/branches/all?query=nightly-2019-10-02-0-azure-conda-linux-gcc-py37
- wheel-manylinux2010-cp27mu:
  URL: https://github.com/ursa-labs/crossbow/branches/all?query=nightly-2019-10-02-0-travis-wheel-manylinux2010-cp27mu
- conda-linux-gcc-py36:
  URL: https://github.com/ursa-labs/crossbow/branches/all?query=nightly-2019-10-02-0-azure-conda-linux-gcc-py36
- wheel-win-cp37m:
  URL: https://github.com/ursa-labs/crossbow/branches/all?query=nightly-2019-10-02-0-appveyor-wheel-win-cp37m
- wheel-win-cp36m:
  URL: https://github.com/ursa-labs/crossbow/branches/all?query=nightly-2019-10-02-0-appveyor-wheel-win-cp36m
- gandiva-jar-osx:
  URL: https://github.com/ursa-labs/crossbow/branches/all?query=nightly-2019-10-02-0-travis-gandiva-jar-osx
- conda-osx-clang-py27:
  URL: https://github.com/ursa-labs/crossbow/branches/all?query=nightly-2019-10-02-0-azure-conda-osx-clang-py27

+ pytest -m 'not requires_testing_data' --pyargs pyarrow
============================= test session starts ==============================
platform linux -- Python 3.7.3, pytest-5.2.0, py-1.8.0, pluggy-0.13.0
hypothesis profile 'default' ->
database=DirectoryBasedExampleDatabase('$SRC_DIR/.hypothesis/examples')
rootdir: $SRC_DIR
plugins: hypothesis-4.38.1
collected 1437 items / 1 errors / 3 deselected / 5 skipped / 1428 selected

==================================== ERRORS ====================================
______________________ ERROR collecting tests/test_fs.py _______________________
../_test_env_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehol/lib/python3.7/site-packages/pyarrow/tests/test_fs.py:91:
in <module>
pytest.lazy_fixture('localfs'),
E AttributeError: module 'pytest' has no attribute 'lazy_fixture'
=============================== warnings summary ===============================
$PREFIX/lib/python3.7/site-packages/_pytest/mark/structures.py:324
$PREFIX/lib/python3.7/site-packages/_pytest/mark/structures.py:324:
PytestUnknownMarkWarning: Unknown pytest.mark.s3 - is this a typo? You
can register custom marks to avoid this warning - for details, see
https://docs.pytest.org/en/latest/mark.html
PytestUnknownMarkWarning,

-- Docs: https://docs.pytest.org/en/latest/warnings.html
!!!!!!!!!!!!!!!!!!! Interrupted: 1 errors during collection !!!!!!!!!!!!!!!!!!!!