Docker: Add a Dockerfile for running WA

With this commit we add a Dockerfile which can be used to create a
Docker image for running WA and devlib. Users are able to use this
image in a Docker container to run workloads on devices, without
requiring WA on their host systems. Please be aware that udev rules
must still be correctly setup on the host.

NOTE: This Dockerfile will accept the Android SDK licenses
automatically.

extras/Dockerfile

@@ -0,0 +1,73 @@
+# This Dockerfile creates an image for use with Workload Automation
+# and/or devlib.
+#
+# To build this Docker image, please run the following command from
+# this directory:
+#
+#   docker build -t wa .
+#
+# This will create an image called wadocker, which is preconfigured to
+# run WA and devlib. Please note that the build process automatically
+# accepts the licenses for the Android SDK, so please be sure that you
+# are willing to accept these prior to building and running the image
+# in a container.
+#
+# To run the container, please run the following command from the
+# directory you wish to work from:
+#
+#   docker run -it --privileged -v /dev/bus/usb:/dev/bus/usb --volume ${PWD}:/workspace --workdir /workspace wa
+#
+# The above command starts the container in privileged mode, with
+# access to USB devices. The current directory is mounted into the
+# image, allowing you to work from there. Any files written to this
+# directory are directly written to the host. Additional "volumes",
+# such as required assets, can be mounted into the container using a
+# second --volume command.
+#
+# When you are finished, please run `exit` to leave the container.
+#
+# NOTE: Please make sure that the ADB server is NOT running on the
+# host. If in doubt, run `adb kill-server` before running the docker
+# container.
+#
+
+# We want to make sure to base this on a recent ubuntu release
+FROM ubuntu:17.10
+
+# Please update the references below to use different versions of
+# devlib, WA or the Android SDK
+ARG DEVLIB_REF=17d32a4d40b2df958d2f26d29095d8671e77894c
+ARG WA_REF=71f0452b73a112e4aa2b5c63f18ff093d0b3f935
+ARG ANDROID_SDK_URL=https://dl.google.com/android/repository/sdk-tools-linux-3859397.zip
+
+RUN apt-get update
+RUN apt-get install -y python-pip git wget zip openjdk-8-jre-headless vim emacs nano curl sshpass ssh usbutils 
+RUN pip install pandas
+
+# Let's get the two repos we need, and install them
+RUN git clone -v https://github.com/ARM-software/devlib.git /tmp/devlib && cd /tmp/devlib && git checkout $DEVLIB_REF && python setup.py install
+RUN git clone -v https://github.com/ARM-software/workload-automation.git -b next /tmp/wa && cd /tmp/wa && git checkout $WA_REF && python setup.py install
+
+# Clean-up
+RUN rm -R /tmp/devlib /tmp/wa
+
+# Create and switch to the wa user
+RUN useradd -m -G plugdev,dialout wa
+USER wa
+
+# Let's set up the Android SDK for the user
+RUN mkdir -p /home/wa/.android
+RUN mkdir -p /home/wa/AndroidSDK && cd /home/wa/AndroidSDK && wget $ANDROID_SDK_URL -O sdk.zip && unzip sdk.zip
+RUN cd /home/wa/AndroidSDK/tools/bin && yes | ./sdkmanager --licenses && ./sdkmanager platform-tools && ./sdkmanager 'build-tools;27.0.3'
+
+# Update the path
+RUN echo 'export PATH=/home/wa/AndroidSDK/platform-tools:${PATH}' >> /home/wa/.bashrc
+RUN echo 'export PATH=/home/wa/AndroidSDK/build-tools:${PATH}' >> /home/wa/.bashrc
+RUN echo 'export ANDROID_HOME=/home/wa/AndroidSDK' >> /home/wa/.bashrc
+
+# Generate some ADB keys. These will change each time the image is build but will otherwise persist.
+RUN /home/wa/AndroidSDK/platform-tools/adb keygen /home/wa/.android/adbkey
+
+# We need to make sure to add the remote assets too
+RUN wa --version && echo 'remote_assets_url: https://raw.githubusercontent.com/ARM-software/workload-automation-assets/master/dependencies' >> /home/wa/.workload_automation/config.yaml
+