New zuulv3 syntax for nodepoolv3.yaml

We recently merged a large change to nodepool.yaml syntax, update ours
to match.

Change-Id: I2abef817e98f30a799c74ba0bb7f67d179761206
Signed-off-by: Paul Belanger <pabelanger@redhat.com>

nodepool/nodepoolv3.yaml

@@ -11,50 +11,44 @@ zookeeper-servers:
 
 labels:
   - name: ubuntu-xenial
-    image: ubuntu-xenial
     min-ready: 2
-    providers:
-      - name: infracloud-chocolate
-      - name: infracloud-vanilla
 
 providers:
   - name: infracloud-chocolate
     region-name: 'RegionOne'
     cloud: infracloud-chocolate
-    api-timeout: 60
     boot-timeout: 120
-    max-servers: 5
     rate: 0.25
-    image-type: 'qcow2'
     image-name-format: '{image.name}-{timestamp}'
-    images:
+    diskimages:
+      - name: ubuntu-xenial
+        config-drive: true
+    pools:
+      - name: main
+        max-servers: 5
+        labels:
           - name: ubuntu-xenial
             min-ram: 8000
             name-filter: 'nodepool'
             diskimage: ubuntu-xenial
-        username: zuul
-        private-key: /home/nodepool/.ssh/id_rsa
-        config-drive: true
+
   - name: infracloud-vanilla
     region-name: 'RegionOne'
     cloud: infracloud-vanilla
-    api-timeout: 60
     boot-timeout: 120
-    max-servers: 5
     rate: 0.25
-    image-type: 'qcow2'
     image-name-format: '{image.name}-{timestamp}'
-    images:
+    diskimages:
+      - name: ubuntu-xenial
+        config-drive: true
+    pools:
+      - name: main
+        max-servers: 5
+        labels:
           - name: ubuntu-xenial
             min-ram: 8000
             name-filter: 'nodepool'
             diskimage: ubuntu-xenial
-        username: zuul
-        private-key: /home/nodepool/.ssh/id_rsa
-        config-drive: true
-
-targets:
-  - name: zuul
 
 diskimages:
   - name: ubuntu-xenial