Some configuration options were accepting both IP addresses
and hostnames. Since there was no specific OSLO opt type to
support this, we were using 'StrOpt'. The support for
'HostAddressOpt' type was merged in Ocata and became
available for use with oslo version 3.22.
This patch changes the opt type of configuration options to
use this more relevant opt type - HostAddressOpt.
Co-Authored-By: John Garbutt <john.garbutt@rackspace.com>
Change-Id: I6116b4cc3deef4b9fad9383ea3e6a570a8becead