upgrade aws library to 1.6.12
Revert "upgrade aws library to 1.6.12"

This reverts commit e2d543fa43ae047d9e0e3a5fc4ff3e9015d7d081.
ensure range selector is sequential in each segment
Merge branch '0.4.0.0' of https://github.com/intel-cloud/cosbench into 0.4.0.0
Merge branch '0.4.0.0' of https://github.com/intel-cloud/cosbench into 0.4.0.0
Merge branch '0.4.0.0' of https://github.com/intel-cloud/cosbench into 0.4.0.0
record more information at the case of unrecognized request