Fix docker build

tools/dockerfile/grpc_artifact_linux_x64/Dockerfile

@@ -31,8 +31,10 @@
 
 FROM debian:jessie
 
+RUN apt-get update && apt-get install debian-keyring && apt-key update
+
 # Install Git and basic packages.
-RUN apt-get update && apt-get install -y \
+RUN apt-get update && apt-key update && apt-get install -y \
   autoconf \
   autotools-dev \
   build-essential \
@@ -67,14 +69,6 @@ RUN /bin/bash -l -c "nvm install 4 && npm install -g node-pre-gyp"
 ##################
 # Python dependencies
 
-# Install bazel
-RUN echo "deb http://httpredir.debian.org/debian jessie-backports main" >   /etc/apt/sources.list.d/backports.list
-RUN apt-get update
-RUN apt-get -t jessie-backports install -y openjdk-8-jdk
-RUN git clone https://github.com/bazelbuild/bazel.git /bazel
-RUN cd /bazel && ./compile.sh
-RUN ln -s /bazel/output/bazel /bin/
-
 RUN apt-get update && apt-get install -y \
     python-all-dev \
     python3-all-dev \

tools/dockerfile/grpc_artifact_linux_x86/Dockerfile

@@ -31,8 +31,10 @@
 
 FROM 32bit/debian:jessie
 
+RUN apt-get update && apt-get install debian-keyring && apt-key update
+
 # Install Git and basic packages.
-RUN apt-get update && apt-get install -y \
+RUN apt-get update && apt-key update && apt-get install -y \
   autoconf \
   autotools-dev \
   build-essential \
@@ -67,14 +69,6 @@ RUN /bin/bash -l -c "nvm install 4 && npm install -g node-pre-gyp"
 ##################
 # Python dependencies
 
-# Install bazel
-RUN echo "deb http://httpredir.debian.org/debian jessie-backports main" >   /etc/apt/sources.list.d/backports.list
-RUN apt-get update
-RUN apt-get -t jessie-backports install -y openjdk-8-jdk
-RUN git clone https://github.com/bazelbuild/bazel.git /bazel
-RUN cd /bazel && ./compile.sh
-RUN ln -s /bazel/output/bazel /bin/
-
 RUN apt-get update && apt-get install -y \
     python-all-dev \
     python3-all-dev \