Remove test assumption about port 0 (it assumed no other memcached server would be running on default)
Remove test assumption about port 0 (it assumed no other memcached server would be running on default)

tony2001/libmemcached,tony2001/libmemcached,mckelvin/libmemcached,mckelvin/libmemcached,tony2001/libmemcached,mckelvin/libmemcached