Add python3 kazoo in Dockerimage
FROM openjdk:8-jdk
# Install some utilities
-RUN apt-get update && apt-get install -y netcat dnsutils python-kazoo python-yaml python-pip python3 python3-pip python3-yaml python3-pip
+RUN apt-get update && apt-get install -y netcat dnsutils python-kazoo python-yaml python-pip python3 python3-kazoo python3-yaml python3-pip
ARG PULSAR_TARBALL
