added change from rrd branch, which fixed incorrect eigenvalues in SD summary file on certain models
added change from rrd branch, which fixed incorrect eigenvalues in SD summary file on certain models

git-svn-id: 1196f5277cea124cdea71ffb60c901dc53c8b09e@321 3fcc0dcb-640f-2d4c-99c7-f8943d75394e

OpenFAST/OpenFAST,OpenFAST/OpenFAST,OpenFAST/OpenFAST