machine if desired. The core_list flags to qps_driver are comma-separated lists of
core numbers.

- make the directory structure match the package structure
- sanitize the package structure (test --> testing)
- add auto-detection of proto file dependencies

Make payloads respect the new defaults

Have not yet added tests with security support, coming soon

Remove some unused options and make server_threads relevant
Start stubbing out better qps/core calculations

of the proto if desired, or just goes to pick_unused_port_or_die if not
specified

reset option to the mark, create a closed loop config params (empty
message) for consistency with other tests.

one for control.
Eliminate the use of our own SimpleRequest and SimpleResponse and
instead share the one from end2end testing

Now setup as a driver and N anonymous workers that may become clients or servers.
Will convert async soon.