Resource adapter modules inside ears are not deployed if there is no application.xml

The EarStructureProcessor processes the deployment of ear files and creates subdeployments for embedded modules that should be added depending on their file extension.
While it already handles web archives by creating and adding the resource root of war files it ignores rar files.

The attached pull request fixes this behaviour by creating and adding a resource root for rar archives as well. (These will no be exploded into the deployments/ folder.)