XD-1526 Removed protobuf-java from dirt classpath

- this was introduced by changing to hadoop22 as default

- need to use the protobuf jar provided by each distro

- updated cdh4 to version cdh 4.6.0
XD-1521: Introduce constant for xd.stream.name and the like
Rename xd.stream.name to xd.job.name
Expose container info under xd.container.*
Address review comments