* Add the verify option for \xff\xff/worker_interfaces
* Remove unused code
* update documentations
* update documentations
* solve comments from review
* update some of the comments to be more clear
Only fetch requested worker interfaces in rebootWorkerActor
Add killall test to multiprocess_fdbcli_tests
Make the rebootWorker only sends requests if all the requested workers are valid
Add comments; Organize print texts; Fix the bug clear the map every time run kill/suspend/expensive_data_check
Chaoguang Lin