- simplify role validation - remove PLCCheckLocal functions, be more explicit about the error in   each method
- simplify role validation
- remove PLCCheckLocal functions, be more explicit about the error in
  each method


dreibh/planetlab-lxc-plcapi,dreibh/planetlab-lxc-plcapi,dreibh/planetlab-lxc-plcapi,dreibh/planetlab-lxc-plcapi