Generate csv files based on pps metric

* src/Makefile
* src/gen_dataset.lua
* src/ts/tests/0001_plan.ts -> src/ts/tests/0001_plan.ts.disabled
* src/ts/tests/0002_plan.ts

$ make csv
luajit -l gen_dataset -e 'gen_dataset.run(5, "make test-bpf-libpcap",
"bpf-libpcap.csv")'
grabbing data for 5 iterations .....
data wrote to bpf-libpcap.csv
luajit -l gen_dataset -e 'gen_dataset.run(5, "make -C ../../pflua/src
test", "bpf-pflua.csv")'
grabbing data for 5 iterations .....
data wrote to bpf-pflua.csv