Added support for ContainerInfo for mesos 0.19.0

This pull request implements a very simple way of configuring the container image (and options) passed when launching Task Trackers. This can work especially well when coupled with the a [Docker Containerizer](http://github.com/mesosphere/deimos) as a way of managing system dependencies requires for running Hadoop jobs.
Merge branch 'feature/containers' into cdh5

Conflicts:
	pom.xml