'A method for storing properties default values.
A method allows to store properties default values, which cannot be
defined in schema in case of specifying in config file.'

def _store_config_default_properties(self, attrs):

    super(Port, self)._store_config_default_properties(attrs)
    if (self.VNIC_TYPE in attrs):
        self.data_set(self.VNIC_TYPE, attrs[self.VNIC_TYPE])
