New package location, archive test_info.txt, add rampup_interval as configurable parameter

Change-Id: I2a0d22410631c7734a8551aa3b7a47e0516a910d
Reviewed-on: http://review.couchbase.org/36869
Reviewed-by: Li Yang <lichenyang2@gmail.com>
Tested-by: buildbot <build@couchbase.com>