270: show-plugins now only shows namespaces with at least one member

ipalib/cli.py

@@ -99,7 +99,7 @@ class show_plugins(public.Application):
                 continue
             for n in member:
                 attr = member[n]
-                if isinstance(attr, plugable.NameSpace):
+                if isinstance(attr, plugable.NameSpace) and len(attr) > 0:
                     self.__traverse_namespace(n, attr, lines, tab + 2)