message: docker: download astyle 3.0.1
  Sometimes the style changes differ between astyle versions 2 and 3,
  therefore let's stick to 3.
diff: @@ -14,12 +14,12 @@ RUN apt-get update \
  cmake \
  build-essential \
  colordiff \
  - astyle \
  git \
  libcurl4-openssl-dev \
  doxygen \
  autoconf \
  libtool \
  + wget \
  ca-certificates \
  autoconf \
  automake \
  @@ -30,6 +30,11 @@ RUN apt-get update \
  && apt-get clean autoclean \
  && rm -rf /var/lib/apt/lists/{apt,dpkg,cache,log} /tmp/* /var/tmp/*
  +# We need the latest astyle version
  +RUN wget http://archive.ubuntu.com/ubuntu/pool/universe/a/astyle/astyle_3.0.1-1ubuntu1_amd64.deb \
  + && dpkg -i astyle_3.0.1-1ubuntu1_amd64.deb \
  + && rm astyle_3.0.1-1ubuntu1_amd64.deb
  +
  RUN pip install grpcio grpcio-tools
  # Install gRPC according to https://github.com/grpc/grpc/blob/v1.6.x/INSTALL.md
  