'Puts core plugin in service_plugins for supported services.'

def _load_services_from_core_plugin(self, plugin):

    LOG.debug('Loading    services    supported    by    the    core    plugin')
    for ext_alias in getattr(plugin, 'supported_extension_aliases', []):
        if (ext_alias in constants.EXT_TO_SERVICE_MAPPING):
            service_type = constants.EXT_TO_SERVICE_MAPPING[ext_alias]
            directory.add_plugin(service_type, plugin)
            LOG.info(_LI('Service    %s    is    supported    by    the    core    plugin'), service_type)
