Issue #3944 (part2) - Bug: agent-install.sh breaks on some k8s enviro…

…nments when when looking for HZN_NAMESPACE_SCOPED env variable

Signed-off-by: Le Zhang <zhangl@us.ibm.com>

agent-install/agent-install.sh

@@ -3595,15 +3595,15 @@ function check_agent_deployment_exist() {
 
             # check 1) agent image in deployment
             # eg: {image-registry}:5000/{repo}/{image-name}:{version}
-            local agent_image_in_use=$($KUBECTL get deployment agent -o jsonpath='{$.spec.template.spec.containers[:1].image}' -n ${AGENT_NAMESPACE})
+            local agent_image_in_use=$($KUBECTL get deployment agent -n ${AGENT_NAMESPACE} -o json | jq -r '.spec.template.spec.containers[0].image')
 
             # {image-registry}:5000/{repo}
             local agent_image_on_edge_cluster_registry=${agent_image_in_use%:*}
             if [[ "$agent_image_on_edge_cluster_registry" != "$IMAGE_ON_EDGE_CLUSTER_REGISTRY" ]]; then
                 log_fatal 3 "Current deployment image registry cannot be updated, please run agent-uninstall.sh and re-run agent-install.sh"
             fi
 
-            local image_pull_secrets_length=$($KUBECTL get deployment agent -n ${AGENT_NAMESPACE} -o jsonpath='{.spec.template.spec.imagePullSecrets}' | jq length)
+            local image_pull_secrets_length=$($KUBECTL get deployment agent -n ${AGENT_NAMESPACE} -o json | jq '.spec.template.spec.imagePullSecrets' | jq length)
             local use_image_pull_secrets
             if [[ "$image_pull_secrets_length" == "1" ]]; then
                 use_image_pull_secrets="true"