downgrade 3.7.0 to 3.6.7

Change-Id: Ibec4a72e91e8cf1601487c974cf930d5fd26b678

python3/Dockerfile

@@ -8,8 +8,8 @@ FROM ubuntu:16.04
 MAINTAINER xt
 
 COPY sources.list /etc/apt/sources.list
-COPY python-3.7.0.tar.xz ./python.tar.xz
-COPY python-3.7.0.tar.xz.asc ./python.tar.xz.asc
+COPY Python-3.6.7.tar.xz ./python.tar.xz
+COPY Python-3.6.7.tar.xz.asc ./python.tar.xz.asc
 COPY get-pip.py ./get-pip.py
 
 # ensure local python is preferred over distribution python
@@ -30,7 +30,7 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
 	&& rm -rf /var/lib/apt/lists/*
 
 ENV GPG_KEY 0D96DF4D4110E5C43FBFB17F2D347EA6AA65421D
-ENV PYTHON_VERSION 3.7.0
+ENV PYTHON_VERSION 3.6.7
 
 RUN set -ex \
 	\

python3/Python-3.6.7.tar.xz.asc

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