change: pin in setuptools in py2 containers (aws#87)

* To avoid using unsupported py2 setuptools

Author: arjkesh

docker/1.4.1/py2/Dockerfile.eia

@@ -48,6 +48,9 @@ RUN pip install --no-cache-dir \
     https://s3.amazonaws.com/amazonei-apachemxnet/amazonei_mxnet-1.4.1-py2.py3-none-manylinux1_x86_64.whl \
     mxnet-model-server==$MMS_VERSION \
     keras-mxnet==2.2.4.1 \
+    # setuptools<45.0.0 because support for py2 stops with 45.0.0
+    # https://github.com/pypa/setuptools/blob/master/CHANGES.rst#v4500
+    "setuptools<45.0.0" \
     onnx==1.4.1 \
     # use sagemaker-inference version comaptible with MMS_VERSION=1.0.5
     sagemaker-inference==1.1.0 \

docker/1.6.0/py2/Dockerfile.cpu

@@ -52,6 +52,9 @@ COPY sagemaker_mxnet_serving_container.tar.gz /sagemaker_mxnet_serving_container
 
 RUN ${PIP} install --no-cache-dir \
     ${MX_URL} \
+    # setuptools<45.0.0 because support for py2 stops with 45.0.0
+    # https://github.com/pypa/setuptools/blob/master/CHANGES.rst#v4500
+    "setuptools<45.0.0" \
     mxnet-model-server==$MMS_VERSION \
     keras-mxnet==2.2.4.1 \
     numpy==1.16.5 \

docker/1.6.0/py2/Dockerfile.gpu

@@ -49,6 +49,9 @@ COPY sagemaker_mxnet_serving_container.tar.gz /sagemaker_mxnet_serving_container
 
 RUN ${PIP} install --no-cache-dir \
     ${MX_URL} \
+    # setuptools<45.0.0 because support for py2 stops with 45.0.0
+    # https://github.com/pypa/setuptools/blob/master/CHANGES.rst#v4500
+    "setuptools<45.0.0" \
     mxnet-model-server==$MMS_VERSION \
     keras-mxnet==2.2.4.1 \
     numpy==1.16.5 \