[Glesys] Attribute :keepip removed from server model

The parameter :keepip should be passed to the destroy method, it is not
available as a attribute on the server object.
[Glesys] Clean up attributes on server model

Add missing attributes and remove attributes that isn't available.
[Glesys] Add public_ip_method to server model
[Glesys] Add setup method to copy fog ssh keys to server
[Glesys] Wrap ssh method to use rootpassword if present
Merge pull request #1519 from smgt/glesys-model-server

[Glesys] Bugs and new features added to glesys compute server model