fix bug: can't get the right value of ready

Author: backwind1233

kubernetes/samples/scripts/create-weblogic-domain-on-azure-kubernetes-service/create-domain-on-aks.sh

@@ -762,7 +762,7 @@ sleep $interval
 
 while [ $waiting_time -lt $max_wait_time ]; do
     status=$(${kubernetesCli} get pod/${domainUID}-admin-server -o=jsonpath='{.status.phase}')
-    ready=$(${kubernetesCli} get pod/${domainUID}-admin-server -o=jsonpath='{.ready.phase}')
+    ready=$(${kubernetesCli} get pod/${domainUID}-admin-server --no-headers | awk '{print $2}')
     if [ "$status" == "Running" ]; then
         if [ "$ready" == "1/1" ]; then
           echo "${domainUID}-admin-server is running. Exiting..."