CBQE-0: fix epydoc error for documetation

Change-Id: I61107d9a92246203c35ca7feee5ea2b367d5bbc7
Reviewed-on: http://review.couchbase.org/43465
Reviewed-by: Sangharsh Agarwal <sangharsh.agarwal@globallogic.com>
Tested-by: Sangharsh Agarwal <sangharsh.agarwal@globallogic.com>