Draft: remove old DraftFillet class, and make it a redirect

Remove the make function that creates the old object,
its corresponding Gui Command, and the old `DraftFillet.Fillet`
proxy class, which now is a redirection to the new `Fillet`
class defined in `draftobjects.fillet`.

Also change the unit test, and the `draft_test_object` script
to run `Draft.make_fillet`.

src/Mod/Draft/draftutils/init_tools.py

@@ -38,7 +38,7 @@ from PySide.QtCore import QT_TRANSLATE_NOOP
 
 def get_draft_drawing_commands():
     """Return the drawing commands list."""
-    return ["Draft_Line", "Draft_Wire", "Draft_Fillet", "Draft_Fillet_new",
+    return ["Draft_Line", "Draft_Wire", "Draft_Fillet",
             "Draft_ArcTools",
             "Draft_Circle", "Draft_Ellipse", "Draft_Rectangle",
             "Draft_Polygon", "Draft_BSpline", "Draft_BezierTools",