cms host find needs to check if local

[jpfleischer]

ping red. if we find red with red.local then everybody is local.
we only need to do this for the manager. then we can assume if everyone else is local.

we need to be removing all known hosts files from the known hosts file.
go through all the hosts and say, ssh-keygen -R {hostname}.local. figure out whether the ending must have .local in this command.
use try except for these Shell.run's.