Merge pull request ibm-messaging#111 from arthurbarr/master

Security fixes

Dockerfile

@@ -86,7 +86,7 @@ RUN export DEBIAN_FRONTEND=noninteractive \
   && rm -rf ${DIR_EXTRACT} \
   # Apply any bug fixes not included in base Ubuntu or MQ image.
   # Don't upgrade everything based on Docker best practices https://docs.docker.com/engine/userguide/eng-image/dockerfile_best-practices/#run
-  && apt-get -y upgrade libc6 libc-bin multiarch-support \
+  && apt-get upgrade -y libsystemd0 systemd systemd-sysv libudev1 \
   # End of bug fixes
   && rm -rf /var/lib/apt/lists/* \
   # Optional: Update the command prompt with the MQ version