add ant Dockerfile, use jdk major version numbers instead

docker/provision/jdk/java-8.sh

@@ -0,0 +1,6 @@
+apt-get update && apt-get install -y software-properties-common
+echo oracle-java8-installer shared/accepted-oracle-license-v1-1 select true | debconf-set-selections
+add-apt-repository -y ppa:webupd8team/java
+apt-get update && apt-get install -y oracle-java8-installer
+
+mv /usr/lib/jvm/java-8-oracle /opt/jdk