fix: MeshObjLoader for loading correctly stl files

git-svn-id: svn://scm.gforge.inria.fr/svnroot/sofa/trunk@9739 b7f1a160-662a-0410-a6d8-bea165342f16
Compliant: changed stabilization parameter name in assembled solver

git-svn-id: svn://scm.gforge.inria.fr/svnroot/sofa/trunk@9740 b7f1a160-662a-0410-a6d8-bea165342f16