Adding license documentation to interface class docblocks.

src/Mod/Fem/Gui/ViewProviderFemConstraint.pyi

@@ -10,6 +10,8 @@ from Gui.ViewProviderGeometryObject import ViewProviderGeometryObject
 )
 class ViewProviderFemConstraint(ViewProviderGeometryObject):
     """
+    Author: Mario Passaglia (mpassaglia@cbc.uba.ar)
+    License: LGPL-2.1-or-later
     This is the ViewProviderFemConstraint class
     """
 

src/Mod/Fem/Gui/ViewProviderFemMesh.pyi

@@ -10,6 +10,8 @@ from Gui.ViewProviderGeometryObject import ViewProviderGeometryObject
 )
 class ViewProviderFemMesh(ViewProviderGeometryObject):
     """
+    Author: Juergen Riegel (Juergen.Riegel@web.de)
+    License: LGPL-2.1-or-later
     ViewProviderFemMesh class
     """
 

src/Mod/Fem/Gui/ViewProviderFemPostFilter.pyi

@@ -13,6 +13,8 @@ from Gui.ViewProviderDocumentObject import ViewProviderDocumentObject
 )
 class ViewProviderFemPostFilter(ViewProviderDocumentObject):
     """
+    Author: Stefan Tröger (stefantroeger@gmx.net)
+    License: LGPL-2.1-or-later
     ViewProviderFemPostPipeline class
     """
 

src/Mod/Fem/Gui/ViewProviderFemPostPipeline.pyi

@@ -10,6 +10,8 @@ from Gui.ViewProviderDocumentObject import ViewProviderDocumentObject
 )
 class ViewProviderFemPostPipeline(ViewProviderDocumentObject):
     """
+    Author: Uwe Stöhr (uwestoehr@lyx.org)
+    License: LGPL-2.1-or-later
     ViewProviderFemPostPipeline class
     """