adding back in double quotes one at a time (#4235)

parts/k8s/addons/kubernetesmasteraddons-omsagent-daemonset.yaml

@@ -200,7 +200,7 @@ metadata:
   labels:
     component: oms-agent
     tier: node
-    kubernetes.io/cluster-service: true
+    kubernetes.io/cluster-service: "true"
     addonmanager.kubernetes.io/mode: Reconcile
 spec:
   replicas: 1