Comment 8 for bug 1531895

I was able to reproduce issue for following network configuration(part of network template):
###
        transformations:
        - action: add-br
          name: br-fw-admin
          provider: ovs
        - action: add-br
          name: br-mgmt
          provider: ovs
        - action: add-patch
          bridges:
          - br-fw-admin
          - br-mgmt
          mtu: 9000
          provider: ovs
          vlan_ids:
          - 100
          - 0
        - action: add-port
          bridge: br-fw-admin
          name: <% if1 %>
###