Revert "CBQE-0: decrease the expires time for tests from 500 seconds to 30 sconds"

This reverts commit 33312bbd6a3abd89500ad5a9fb79f091b2a7a5aa.

Sangharsh, why such a change? it is assumed that the items can still expire during and after rebalancing. but not  when all the items on the old nodes(~30 sec)

Change-Id: Iccbc3a105b09f9dc970819c6f4b02955fee890ad
Reviewed-on: http://review.couchbase.org/37578
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Andrei Baranouski <andrei.baranouski@gmail.com>