CBQE-1338 expand test coverage for single node mac

Change-Id: Iaa0df31136283002b918f2ee16994421649c602e
Reviewed-on: http://review.couchbase.org/26898
Reviewed-by: Chisheng Hong <chisheng@couchbase.com>
Tested-by: Chisheng Hong <chisheng@couchbase.com>
CBQE-0: attempt to fix incremental_rebalance_in_out_with_mutation_and_expiration

MemcachedError: Memcached error #7 'Not my vbucket':  Connection reset
http://qa.hq.northscale.net/job/centos-64-2.0-basic-rebalance-tests-P0/476/consoleFull

Change-Id: I7b863619cc2b1dd3787f311f587557653713ab86
Reviewed-on: http://review.couchbase.org/26899
Reviewed-by: Andrei Baranouski <andrei.baranouski@gmail.com>
Tested-by: Andrei Baranouski <andrei.baranouski@gmail.com>