UPDMRTF — modify the term NodeRole so that is more applicable to a Peformer

The term NodeRole is more applicable to MODAF than DoDAF and does not derive from Performer, Ron Williamson sugested PerformerRole.
There are other terms that could be affected in the this way like NodeOperation.

Even though I understand the need, I am against creating more Stereotypes that are Aliases for DODAF. It becomes harder to maintain and more problematic for implement. I would suggest that we rationalise the name of the stereotype for instances of Nodes/Performers to be aligned with both MODAF and DoDAF, i.e. OperationalNode.