Glean config on OVH nodes

Instruct glean via metadata properties to ignore the config drive
network_data.json interface data on OVH and instead fall back to DHCP.
This is necessary because post upgrade OVH config drive
network_data.json provides inaccurate network configuration details and
DHCP is actually what is needed there for working l2 networking.

Change-Id: I51f16d34a96ee8d964e8b540ce5113a662a56f6d

nodepool/nl04.openstack.org.yaml

@@ -57,51 +57,71 @@ providers:
             flavor-name: ssd-osFoundation-3
             diskimage: centos-7
             key-name: infra-root-keys-2018-06-15
+            instance-properties:
+              glean_ignore_interfaces: 'True'
           - name: debian-stretch
             min-ram: 8000
             flavor-name: ssd-osFoundation-3
             diskimage: debian-stretch
             key-name: infra-root-keys-2018-06-15
+            instance-properties:
+              glean_ignore_interfaces: 'True'
           - name: fedora-28
             min-ram: 8000
             flavor-name: ssd-osFoundation-3
             diskimage: fedora-28
             key-name: infra-root-keys-2018-06-15
+            instance-properties:
+              glean_ignore_interfaces: 'True'
           - name: gentoo-17-0-systemd
             min-ram: 8000
             flavor-name: ssd-osFoundation-3
             diskimage: gentoo-17-0-systemd
             key-name: infra-root-keys-2018-06-15
+            instance-properties:
+              glean_ignore_interfaces: 'True'
           - name: opensuse-423
             min-ram: 8000
             flavor-name: ssd-osFoundation-3
             diskimage: opensuse-423
             key-name: infra-root-keys-2018-06-15
+            instance-properties:
+              glean_ignore_interfaces: 'True'
           - name: opensuse-150
             min-ram: 8000
             flavor-name: ssd-osFoundation-3
             diskimage: opensuse-150
             key-name: infra-root-keys-2018-06-15
+            instance-properties:
+              glean_ignore_interfaces: 'True'
           - name: opensuse-tumbleweed
             min-ram: 8000
             flavor-name: ssd-osFoundation-3
             diskimage: opensuse-tumbleweed
             key-name: infra-root-keys-2018-06-15
+            instance-properties:
+              glean_ignore_interfaces: 'True'
           - name: ubuntu-bionic
             min-ram: 8000
             flavor-name: ssd-osFoundation-3
             diskimage: ubuntu-bionic
             key-name: infra-root-keys-2018-06-15
+            instance-properties:
+              glean_ignore_interfaces: 'True'
           - name: ubuntu-trusty
             min-ram: 8000
             flavor-name: ssd-osFoundation-3
             diskimage: ubuntu-trusty
             key-name: infra-root-keys-2018-06-15
+            instance-properties:
+              glean_ignore_interfaces: 'True'
           - name: ubuntu-xenial
             min-ram: 8000
             flavor-name: ssd-osFoundation-3
             diskimage: ubuntu-xenial
             key-name: infra-root-keys-2018-06-15
+            instance-properties:
+              glean_ignore_interfaces: 'True'
 
   - name: ovh-gra1
     region-name: 'GRA1'