Modify noop module code in arch.rst
Modify noop module code in arch.rst

Synchronize the documentation and code

Change-Id: I5f6916dee6519b9ac2b86290b3e691fdc431cb23

openstack/cloudkitty,muraliselva10/cloudkitty,stackforge/cloudkitty,stackforge/cloudkitty,openstack/cloudkitty,muraliselva10/cloudkitty