CBLT-238:  if only 1 string param, it's not an array

Change-Id: Ibdd75016e5d716bc9f3ce4f3575cb9011bd1f38d
Reviewed-on: http://review.couchbase.org/34867
Reviewed-by: Philip Labee <philip@couchbase.com>
Tested-by: Philip Labee <philip@couchbase.com>