CBQE-0: _create_standard_buckets with eviction_policy param

Change-Id: I875dde59ce3714e8cccd0f9a2555d0468c3f6dcf
Reviewed-on: http://review.couchbase.org/36585
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Andrei Baranouski <andrei.baranouski@gmail.com>