- clean up how vserver specific slice attributes are added to sm.py   DEFAULT_ALLOCATION table.
- clean up how vserver specific slice attributes are added to sm.py
  DEFAULT_ALLOCATION table.

- clean up how we check for the certain slice attributes in the
  set_resources() method.


dreibh/planetlab-lxc-nodemanager,dreibh/planetlab-lxc-nodemanager,planetlab/NodeManager,planetlab/NodeManager,planetlab/NodeManager,planetlab/NodeManager,dreibh/planetlab-lxc-nodemanager