Logging
Wait for explicit minions in gather job info

Improves syndic case because gather job info doesn't exit quickly
thinking it's found all minions before syndic has responded
Less hacky? way of passing known minions around

Gets of the known_minions arg on cmd to have gather_job_info do more
work
Merge pull request #10173 from mbirtwell/wait_for_explicit_minions_in_gather_job_info_develop

Wait for explicit minions in gather job info develop