CCBC-370: Return consistent host/port from lcb_get_host/port

Change-Id: I474616a56639beb70d4105bde4de28748980d7c1
Reviewed-on: http://review.couchbase.org/35980
Reviewed-by: Sergey Avseyev <sergey.avseyev@gmail.com>
Tested-by: Mark Nunberg <mnunberg@haskalah.org>