CBQE-1446: add port/password tests to backup restore

Change-Id: I99c0de0596efc091e13ef23486a9aafe201a93e2
Reviewed-on: http://review.couchbase.org/27980
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Iryna Mironava <irynamironava@yandex.ru>