Backport of 2905: SD: Fix a bug where interface DoF loads are incomplete if the interface joint is part of a rigid assembly#2934

andrew-platt merged 2 commits into

OpenFAST:rc-4.1.2OpenFAST/openfast:rc-4.1.2from

andrew-platt:bp/2905_SD_RigidLinkandrew-platt/openfast:bp/2905_SD_RigidLinkCopy head branch name to clipboard