According to RFC1034 [1], underscores are not legitimate symbols for
hostnames. We have a naming convention that historically uses underscores
in names of containers which leads to a complications in some cases/logic
Moreover, container actual hostnames are always different from their
inventory_hostnames, which might break some logic of external dependencies.
To change this historical issue, all new containers will have different
naming convention, where only dash will be used as a separator.
This will not touch already existing in inventory containers and they will
preserve their names for the time being.
[1] http://www.faqs.org/rfcs/rfc1034.html
Change-Id: Iedebf9935059ecfe8370f2a84ad52516cc93320e
d74d038032