[CRIU] [PATCH 0/3] zdtm.py: Implement testing CRIU's RPC

[Pavel Emelyanov]

So, in zdtm.py we run criu as CLI tool using python's subprocess.Popen
facility. With this the RPC part of the API is completely untested, so
let's try to improve that. Here's the --rpc option for zdtm.py that 
spawns CRIU in swrk mode instead of CLI.

However, there's a question -- what are the suggestions about how to
integrate this in CI? Apparently we cannot afford duplicating all the 
jobs with --rpc option %)

-- Pavel