[7.4.beta][OpenShift][Docs] Configuring DNS_PING service should include "publishNotReadyAddresses": true

See also https://issues.jboss.org/browse/CLOUD-3017

The Configuring DNS_PING chapter https://doc-stage.usersys.redhat.com/documentation/en-us/red_hat_jboss_enterprise_application_platform/7.2/html-single/getting_started_with_jboss_eap_for_openshift_container_platform/#configuring_dns_ping

should be updated with the new publishNotReadyAddresses property (should be set to true), which replaces the "service.alpha.kubernetes.io/tolerate-unready-endpoints" annotation used in older OCP versions.

We should recommend using both service.alpha.kubernetes.io/tolerate-unready-endpoints annotation and publishNotReadyAddresses: true so it works in both the older and newer OCP versions (the current EAP 7.2 templates use both )

kind: Service
apiVersion: v1
spec:
    publishNotReadyAddresses: true
    clusterIP: None
    ports:
    - name: ping
      port: 8888
    selector:
        deploymentConfig: eap-app
metadata:
    name: eap-app-ping
    annotations:
        service.alpha.kubernetes.io/tolerate-unready-endpoints: "true"
        description: "The JGroups ping port for clustering."