k8s: check for nodes to be ready in playbooks

We don't need to check if the cluster is ready in CI, it should
happen inside the library.

Change-Id: I6d600d49bde919852a8161b5409ad8ea9efa0147

ansible/site.yaml

@@ -169,3 +169,11 @@
       changed_when: false
       shell: |
         kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml
+
+    - name: Wait for all nodes to get ready
+      run_once: true
+      shell: kubectl get nodes
+      register: _kubectl_get_nodes
+      retries: 30
+      delay: 3
+      until: '"NotReady" not in _kubectl_get_nodes.stdout'

playbooks/run.yaml

@@ -23,13 +23,6 @@
 
 - hosts: masters[0]
   tasks:
-    - name: Wait for all nodes to get ready
-      shell: kubectl get nodes
-      register: _kubectl_get_nodes
-      retries: 30
-      delay: 3
-      until: '"NotReady" not in _kubectl_get_nodes.stdout'
-
     - name: Download sonobuoy
       become: true
       unarchive: