Avoiding name collision with altered Bestiary duergar.

[Note: This was really a bug with Psionics Unleashed, which also led to changes to Unlimited Possibilities, rather than an issue with Pawns and Powers.]
Issue#: NEWSOURCE-152


git-svn-id: svn+ssh://svn.code.sf.net/p/pcgen/code/Trunk/pcgen@19404 ef53c05b-3124-4d59-ae7d-fe3273f42be7