Test whether server gets reconnected when user idle for longer than timeout interval

see inline discussion here: http://review.couchbase.org/#/c/26462/2/src/timeout.c

Basically, the semantics of the timeouts aren't clear - the timeout will unconditionally purge the server and disconnect if the timeout hits, even if there is nothing waiting.

In practice this might not be a bug, but it means needless connection code to the server (and SASL auth) is being executed each time.