Validation tool based on integrity check.

[ywang19]

Cosbench has one feature to support integrity check, which could be useful to user for system validation or hardware stress testing, e.g., running workloads over night with hashcheck enabled, to check if and how many corruptions occur.
But besides xml configuration file, there is no direct way to let user know it. it's expected to give easy path (like UI) for this intention.