Merge pull request #1977 from mattymo/initializers

Disable initializers feature gate if istio is not used

roles/kubespray-defaults/defaults/main.yaml

@@ -167,7 +167,7 @@ rbac_enabled: "{{ 'RBAC' in authorization_modes or kubeadm_enabled }}"
 
 ## List of key=value pairs that describe feature gates for
 ## the k8s cluster.
-kube_feature_gates: ['Initializers=true', 'PersistentLocalVolumes={{ local_volumes_enabled|string }}']
+kube_feature_gates: ['Initializers={{ istio_enabled|string }}', 'PersistentLocalVolumes={{ local_volumes_enabled|string }}']
 
 # Vault data dirs.
 vault_base_dir: /etc/vault