The current code sets tunnel types for the neutron agent
even when the network type is 'vlan'. This results in the
agent not starting because 'vlan' is not a valid tunnel type.
This patch changes it so tunnel_types is not populated when
vlans are used.
This bug just now surfaced because of commit
8feaf6c951 requiring Q_ML2_TENANT_NETWORK_TYPE
to be set to avoid being set to the 'local' type.
Change-Id: If2bc57b36dad2bfb34df573581acce176604812e