add docker files for CI

dockers/Java11-Python2/Dockerfile

+#
+# Ubuntu-20.04 Docker Container
+#
+
+FROM ubuntu:20.04
+
+ENV DEBIAN_FRONTEND noninteractive
+
+
+# Install Dev tools
+RUN apt-get update && apt-get install -y tar wget unzip git maven openssh-client python2
+
+RUN mkdir ~/.ssh && chmod 700 ~/.ssh
\ No newline at end of file

dockers/Java8-Python2/Dockerfile

+#
+# Ubuntu-20.04 Docker Container
+#
+
+FROM ubuntu:20.04
+
+ENV DEBIAN_FRONTEND noninteractive
+
+
+# Install Dev tools
+RUN apt-get update && apt-get install -y tar wget unzip git maven openssh-client python2
+RUN rm -rf /usr/lib/jvm/java-11-openjdk-amd64
+RUN apt-get install -y openjdk-8-jdk
+
+RUN mkdir ~/.ssh && chmod 700 ~/.ssh
\ No newline at end of file