message: Pin more-itertools==5.0.0 to fix pytest issue
diff: @@ -19,6 +19,8 @@ if [[ $(lsb_release -r | awk '{ print $2 }') == "16.04" ]]; then
  pip install -q tensorflow==${TENSORFLOW_VERSION}
  pip install -q artifacts/tensorflow_io*-cp27-*.whl
  pip install -q pytest
  + # Pin more-itertools==5.0.0 as otherwise pytest will fail
  + pip install -q more-itertools==5.0.0
  (cd tests && python -m pytest -s .)
  echo Success
  exit 0
  @@ -28,6 +30,8 @@ if [[ $(lsb_release -r | awk '{ print $2 }') == "16.04" ]]; then
  pip3 install -q tensorflow==${TENSORFLOW_VERSION}
  pip3 install -q artifacts/tensorflow_io*-cp35-*.whl
  pip3 install -q pytest
  + # Pin more-itertools==5.0.0 as otherwise pytest will fail
  + pip3 install -q more-itertools==5.0.0
  (cd tests && python3 -m pytest -s .)
  echo Success
  exit 0
  @@ -40,6 +44,8 @@ elif [[ $(lsb_release -r | awk '{ print $2 }') == "18.04" ]]; then
  pip install -q tensorflow==${TENSORFLOW_VERSION}
  pip install -q artifacts/tensorflow_io*-cp27-*.whl
  pip install -q pytest
  + # Pin more-itertools==5.0.0 as otherwise pytest will fail
  + pip install -q more-itertools==5.0.0
  (cd tests && python -m pytest -s .)
  echo Success
  exit 0
  @@ -49,6 +55,8 @@ elif [[ $(lsb_release -r | awk '{ print $2 }') == "18.04" ]]; then
  pip3 install -q tensorflow==${TENSORFLOW_VERSION}
  pip3 install -q artifacts/tensorflow_io*-cp36-*.whl
  pip3 install -q pytest
  + # Pin more-itertools==5.0.0 as otherwise pytest will fail
  + pip3 install -q more-itertools==5.0.0
  (cd tests && python3 -m pytest -s .)
  echo Success
  exit 0
  