Re-enables Docker tests now that we're green
Re-enables Docker tests now that we're green

twitter/zipkin,twitter/zipkin,openzipkin/zipkin,adriancole/zipkin,openzipkin/zipkin,adriancole/zipkin,openzipkin/zipkin,twitter/zipkin,adriancole/zipkin,openzipkin/zipkin,adriancole/zipkin,twitter/zipkin,openzipkin/zipkin