PYCBC-384: Fix typo: list_size, not list_length
PYCBC-384: Fix typo: list_size, not list_length

Change-Id: If0540b05f3461cf4e572ab8ecec366ac38713def
Reviewed-on: http://review.couchbase.org/73752
Reviewed-by: Subhashni Balakrishnan <7129c8e37b832c7bd362ff375532d24b98ef5162@gmail.com>
Tested-by: Mark Nunberg <dab05a0fe859c5cb93882b2a75a0d613501b07be@couchbase.com>

couchbase/couchbase-python-client,couchbase/couchbase-python-client