childs -> children

Change-Id: I0cebdb6f36aa7e631f56fa00d2e13ca05fc209a8
Reviewed-on: http://review.couchbase.org/42816
Tested-by: Artem Stemkovski <artem@couchbase.com>
Reviewed-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>