Update command line options for the codes workload mpi-replay tool
Modify the mpi-replay tool (located at tests/workload) to spit out verbose information on each event it replays, if user specifies -v option. Also, modify the mpi-replay tool to perform no-ops for each replayed event, if user specifies --noop option. The replay tool should function properly for all workload types now. TODO: The tool should offer functionality for initializing the context of the output replay directory. That is, the tool should first scan the given workload and create all files and preallocate space for all I/O ops in the workload. Currently, the replay tool will fail on any files that are not explicitly created by the workload.