Support actions / Add communication benchmarks directory

[mauropasse]

Commits:
d50eebd Support Actions and add comms_benchmark dir

• comms_benchmark directory contains scripts to run benchmarks plus topologies:
  • Benchmarks for Pub/Sub, Cli/Srv, Actions
    • Single-process / Multi-process
    • Uses 10B/100KB/1MB/4MB
  • For example, irobot_benchmark/comms_benchmark/scripts/actions/run_single_process_benchmarks.sh is the script to run single process benchmarks on actions.
  • irobot_benchmark/comms_benchmark/scripts/parse-results contains scripts to parse the results.
• This commit also adds support for actions, allowing to create them from the usual json topology files.

e67baa4 Improve error handling in data parsing and file operations
2fdd9bc warning if negative latency for multi-host benchmarks
5d4e998 Show latency even if msg arrived late
0f646cf Add option to create results directory
9def392 Remove irobot_events_executor dependency
24cf6b2 Remove option and always name threads