ModuleMetadata repo exclude redundant props

  - On find, Filter out default module properties like 'xd.stream.name' and 'xd.module.index'
  - those are readily available in the ModuleMetadata ID

Move ContainerArributes bean

- Move into ContainerServerApplication as it is relevant only to container
- was previously in ParentConfiguration

Handle empty module metadata
add toString to ContainerAttributes
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