Use pandas 0.23.4 everywhere

Change-Id: Ida57c847d9baa9052e59d207b5a91bfc9ca00c72

python/manylinux1/scripts/build_virtualenvs.sh

@@ -19,7 +19,7 @@
 # Build upon the scripts in https://github.com/matthew-brett/manylinux-builds
 # * Copyright (c) 2013-2016, Matt Terry and Matthew Brett (BSD 2-clause)
 
-PYTHON_VERSIONS="${PYTHON_VERSIONS:-2.7,16 2.7,32 3.4,16 3.5,16 3.6,16}"
+PYTHON_VERSIONS="${PYTHON_VERSIONS:-2.7,16 2.7,32 3.5,16 3.6,16}"
 
 source /multibuild/manylinux_utils.sh
 
@@ -32,18 +32,16 @@ for PYTHON_TUPLE in ${PYTHON_VERSIONS}; do
     PIP="$(cpython_path $PYTHON ${U_WIDTH})/bin/pip"
     PATH="$PATH:$(cpython_path $PYTHON ${U_WIDTH})"
 
-    PANDAS_TEST_VERSION="0.23.4"
-
     echo "=== (${PYTHON}, ${U_WIDTH}) Installing build dependencies ==="
     $PIP install "numpy==1.10.4"
     $PIP install "cython==0.28.1"
-    $PIP install "pandas==0.20.3"
+    $PIP install "pandas==0.23.4"
     $PIP install "virtualenv==15.1.0"
 
     echo "=== (${PYTHON}, ${U_WIDTH}) Preparing virtualenv for tests ==="
     "$(cpython_path $PYTHON ${U_WIDTH})/bin/virtualenv" -p ${PYTHON_INTERPRETER} --no-download /venv-test-${PYTHON}-${U_WIDTH}
     source /venv-test-${PYTHON}-${U_WIDTH}/bin/activate
-    pip install pytest 'numpy==1.14.0' 'pandas==$PANDAS_TEST_VERSION'
+    pip install pytest 'numpy==1.14.0' 'pandas==0.23.4'
     deactivate
 done