The plugin implementations need to be isolated from the
entity that is using os-vif. Plugins should be allowed
to define their own custom config parameters, without
needing the user of os-vif to pass further options into
the os_vif.initialize() method.
This change introduces a CONFIG_OPTS attribute on the
Plugin class. This provides a list of oslo_config
options that are to be used by the plugin. os_vif will
register these options into a group 'os_vif_$PLUGIN'
eg 'os_vif_linux_bridge'.
This gives the plugin impls the ability to have config
options in the main project conf (ie /etc/nova/nova.conf)
without exposing them directly to all of nova's own
config options.
Change-Id: I9634b474cd0d3fda09aef5800020c9415c28e3d8
72d5dfbf48