Fix etcd race condition issue

Currently, Magnum is using k8s API /version to check the API
availibility which is not a good way because /version only
reflects if the basic k8s api is working on not. And it will
return response even the etcd service is down. This patch fixes
it by using /healthz to replace /version.

Task: 22566
Story: 1775759

Change-Id: I45a1bd48a22842a251dafa6c349f0022fd319e3f

magnum/drivers/common/templates/kubernetes/fragments/calico-service.sh

@@ -456,7 +456,7 @@ if [ "$MASTER_INDEX" != "0" ]; then
     exit 0
 fi
 
-until curl -sf "http://127.0.0.1:8080/healthz"
+until  [ "ok" = "$(curl --silent http://127.0.0.1:8080/healthz)" ]
 do
     echo "Waiting for Kubernetes API..."
     sleep 5

magnum/drivers/common/templates/kubernetes/fragments/core-dns-service.sh

@@ -255,7 +255,7 @@ if [ "$MASTER_INDEX" != "0" ]; then
 fi
 
 echo "Waiting for Kubernetes API..."
-until curl --silent "http://127.0.0.1:8080/version"
+until  [ "ok" = "$(curl --silent http://127.0.0.1:8080/healthz)" ]
 do
     sleep 5
 done

magnum/drivers/common/templates/kubernetes/fragments/enable-ingress-traefik.sh

@@ -121,7 +121,7 @@ fi
 
 # Binary for ingress traefik
 INGRESS_TRAEFIK_BIN_CONTENT='''#!/bin/sh
-until curl -sf "http://127.0.0.1:8080/healthz"
+until  [ "ok" = "$(curl --silent http://127.0.0.1:8080/healthz)" ]
 do
     echo "Waiting for Kubernetes API..."
     sleep 5

magnum/drivers/common/templates/kubernetes/fragments/enable-prometheus-monitoring.sh

@@ -369,7 +369,7 @@ GRAFANA_DEF_DASHBOARD_FILE=$GRAFANA_DEF_DASHBOARDS"/default.json"
 
 # Write the binary for enable-monitoring
 KUBE_MON_BIN_CONTENT='''#!/bin/sh
-until curl -sf "http://127.0.0.1:8080/healthz"
+until  [ "ok" = "$(curl --silent http://127.0.0.1:8080/healthz)" ]
 do
     echo "Waiting for Kubernetes API..."
     sleep 5

magnum/drivers/common/templates/kubernetes/fragments/kube-apiserver-to-kubelet-role.sh

@@ -12,7 +12,7 @@ if [ "$MASTER_INDEX" != "0" ]; then
 fi
 
 echo "Waiting for Kubernetes API..."
-until curl --silent "http://127.0.0.1:8080/version"
+until  [ "ok" = "$(curl --silent http://127.0.0.1:8080/healthz)" ]
 do
     sleep 5
 done

magnum/drivers/common/templates/kubernetes/fragments/kube-dashboard-service.sh

@@ -335,8 +335,14 @@ spec:
 EOF
     }
 
+    if [ "$MASTER_INDEX" != "0" ]; then
+        exit 0
+    fi
+
+
+
     echo "Waiting for Kubernetes API..."
-    until curl --silent "http://127.0.0.1:8080/version"
+    until  [ "ok" = "$(curl --silent http://127.0.0.1:8080/healthz)" ]
     do
         sleep 5
     done
@@ -459,7 +465,7 @@ if [ "$MASTER_INDEX" != "0" ]; then
 fi
 
 echo "Waiting for Kubernetes API..."
-until curl --silent "http://127.0.0.1:8080/version"
+until  [ "ok" = "$(curl --silent http://127.0.0.1:8080/healthz)" ]
 do
     sleep 5
 done

magnum/drivers/common/templates/kubernetes/fragments/wc-notify-master.sh

@@ -13,7 +13,8 @@ WC_NOTIFY_SERVICE=/etc/systemd/system/wc-notify.service
 
 cat > $WC_NOTIFY_BIN <<EOF
 #!/bin/bash -v
-until curl -sf "http://127.0.0.1:8080/healthz"; do
+until  [ "ok" = "$(curl --silent http://127.0.0.1:8080/healthz)" ]
+do
     echo "Waiting for Kubernetes API..."
     sleep 5
 done
@@ -23,8 +24,8 @@ EOF
 cat > $WC_NOTIFY_SERVICE <<EOF
 [Unit]
 Description=Notify Heat
-After=docker.service etcd.service
+After=docker.service
-Requires=docker.service etcd.service
+Requires=docker.service
 [Service]
 Type=oneshot
 ExecStart=$WC_NOTIFY_BIN