Upgrade to Java 11 in Dockerfile and update some comments in the

buildDockerImage script.

VMs/Dockerfile

@@ -5,8 +5,8 @@ MAINTAINER "Dave Wichers [email protected]"
 RUN apt-get update
 RUN DEBIAN_FRONTEND="noninteractive" apt-get -y install tzdata
 RUN apt-get install -q -y \
-     openjdk-8-jre-headless \
-     openjdk-8-jdk \
+     openjdk-11-jre-headless \
+     openjdk-11-jdk \
      git \
      maven \
      wget \

VMs/buildDockerImage.sh

@@ -1,13 +1,13 @@
-# Pull in latest version of ubuntu
+# Pull in latest version of ubuntu. This builds an image using the OS native to this platform.
 docker pull ubuntu:latest
-# Remove any ubuntu:<none> image if it was left behind by a new version of ubunto:latest being pulled
+# Remove any ubuntu:<none> image if it was left behind by a new version of ubuntu:latest being pulled
 i=$(docker images | grep "ubuntu" | grep "<none" | awk '{print $3}')
 if [ "$i" ]
 then
   docker rmi $i
 fi
 
-# Since Docker doesn't auto delete anything, just like for the Ubunto update, delete any existing benchmark:latest image before building a new one
+# Since Docker doesn't auto delete anything, just like for the Ubuntu update, delete any existing benchmark:latest image before building a new one
 docker image rm benchmark:latest
 docker build -t benchmark .