CBQE-1657: add multihostname tests

Change-Id: I62558cc2013e2cfbb3fcb71291c5b0828ac9b0e4
Reviewed-on: http://review.couchbase.org/38322
Reviewed-by: Andrei Baranouski <andrei.baranouski@gmail.com>
Tested-by: buildbot <build@couchbase.com>