add livenessProbe to kube-apiserver.manifest

cluster/saltbase/salt/kube-apiserver/kube-apiserver.manifest

@@ -103,6 +103,14 @@
                  "-c",
                  "/usr/local/bin/kube-apiserver {{params}} --allow_privileged={{pillar['allow_privileged']}} 1>>/var/log/kube-apiserver.log 2>&1"
                ],
+    "livenessProbe": {
+      "httpGet": {
+        "path": "/healthz",
+        "port": 8080
+      },
+      "initialDelaySeconds": 15,
+      "timeoutSeconds": 15
+    },
     "ports":[
       { "name": "https",
         "containerPort": {{secure_port}},