Add namespaced_function function

This will allow for imported functions to live under
the new global namespace.

Copied directly from saltcloud.utils

salt/utils/__init__.py

@@ -1119,3 +1119,20 @@ def get_hash(path, form='md5', chunk_size=4096):
             if not chunk:
                 return hash_obj.hexdigest()
             hash_obj.update(chunk)
+
+
+def namespaced_function(function, global_dict, defaults=None):
+    ''' 
+    Redefine(clone) a function under a different globals() namespace scope
+    '''
+    if defaults is None:
+        defaults = function.__defaults__
+
+    new_namespaced_function = types.FunctionType(
+        function.__code__,
+        global_dict,
+        name=function.__name__,
+        argdefs=defaults
+    )   
+    new_namespaced_function.__dict__.update(function.__dict__)
+    return new_namespaced_function