'Instantiate a qos driver.
:param name: driver name.
:param vif_types: list of interfaces (VIFs) supported.
:param vnic_types: list of vnic types supported.
:param supported_rules: dict of supported rules.
:param requires_rpc_notifications: indicates if this driver
expects rpc push notifications to be sent from the driver.'

def __init__(self, name, vif_types, vnic_types, supported_rules, requires_rpc_notifications=False):

    self.name = name
    self.vif_types = vif_types
    self.vnic_types = vnic_types
    self.supported_rules = supported_rules
    self.requires_rpc_notifications = requires_rpc_notifications
