Merge branch 'release/v1.0.3'
Merge tag 'v1.0.3' into develop

Release v1.0.3.

Back to using Centos as the base image to match what we normally use.

The centos:latest base image won't install OpenJDK7-jdk, so I switched to Ubuntu. To get back to CentOS, I'm now using centos:centos6.