CBQE-928:online upgrade with different port test

Change-Id: Icd1f2cd350de6865ae96bcb20aeac91d3ddb8de3
Reviewed-on: http://review.couchbase.org/24199
Reviewed-by: Iryna Mironava <irynamironava@yandex.ru>
Tested-by: Iryna Mironava <irynamironava@yandex.ru>