zenoss.winrm.Services: Refactor and rename.

Renamed from WinServices to Services. The Win part was redundant with
the namespace. Significantly shortened and simplified by better using
the WinRMPlugin base class.
Add zenoss.winrm.Routes modeler plugin.

This moves route modeling from WinOS and ClusterOS into a separate
modeler plugin. Benefits are removing code duplication and allowing
users to selectively enable or disable route modeling. The new modeling
plugin has intentionally not been enabled by default because Zenoss no
longer has a functional use for modeling routes.
zenoss.winrm.Routes: Reference results explicitely.
Add zenoss.winrm.FileSystems modeler plugin.

Moves FileSystem modeling from the WinOS and ClusterOS modeler plugins
into a separate modeler plugin. Benefits include consolidating duplicate
code and allowing the user to selectively enable or disable modeling of
just file systems.
Fix refactored FileSystem modeling.