Use HostAddressOpt for opts that accept IP and hostnames
Use HostAddressOpt for opts that accept IP and hostnames

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 change [1] that
added 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.

[1] I77bdb64b7e6e56ce761d76696bc4448a9bd325eb

Change-Id: Ifc30ed5dbb7a9666d8c74c8cfb3645a6a0e34d16

stackforge/blazar,openstack/blazar,ChameleonCloud/blazar,ChameleonCloud/blazar,openstack/blazar,stackforge/blazar