[Doc] Remove mention of templates in EAP8 OpenShift documentation

Templates were replaced with helm charts in EAP8. But there are still some references to templates:

• https://access.redhat.com/documentation/en-us/red_hat_jboss_enterprise_application_platform/8-beta/html-single/using_jboss_eap_on_openshift_container_platform/index#proc_prepare-for-the-development_assembly_building-and-running-jboss-eap-applicationson-openshift-container-platform

Note

You must create a keystore and a secret if you use any HTTPS-enabled features in your OpenShift project; for example, the eap74-https-s2i template. The kitchensink quickstart example does not use an HTTPS template, so it doesn’t require a keystore and secret. 

Is it possible to rewrite into helm variant?

• https://access.redhat.com/documentation/en-us/red_hat_jboss_enterprise_application_platform/8-beta/html-single/using_jboss_eap_on_openshift_container_platform/index#assembly_configuring-the-jvm-to-run-your-eap-application_default

Not sure what "application template parameters" refer to. If it refer to templates which were removed in EAP8, then it should be replaced with helm variant or removed.

• https://access.redhat.com/documentation/en-us/red_hat_jboss_enterprise_application_platform/8-beta/html-single/using_jboss_eap_on_openshift_container_platform/index#deploying-a-java-application-on-openshift-using-the-eap-operator_assembly_jboss-eap-operator-for-automating-application-deployment-on-openshift

The APPLICATION_IMAGE parameter in your eap-s2i-build template has an imagestream, if you want to enable automatic upgrade of your application after it is deployed on OpenShift. 

We do not deliver eap-s2i-build template anymore

• 7.1. Troubleshooting Pod restarts https://access.redhat.com/documentation/en-us/red_hat_jboss_enterprise_application_platform/8-beta/html-single/using_jboss_eap_on_openshift_container_platform/index#proc_troubleshooting-pod-restarts_default

Does {{ OpenShift templates}} refer to templates which were removed in EAP8?

• 8.4.1.1. Datasource Configuration Environment Variables
  https://access.redhat.com/documentation/en-us/red_hat_jboss_enterprise_application_platform/8-beta/html-single/using_jboss_eap_on_openshift_container_platform/index#datasource_configuration_environment_variables

Seems to me {{ OpenShift application template}} refers to templates which were removed in EAP8

• https://access.redhat.com/documentation/en-us/red_hat_jboss_enterprise_application_platform/8-beta/html-single/using_jboss_eap_on_openshift_container_platform/index#configuring_a_jgroups_discovery_mechanism

This {{If you use one of the available application templates to deploy an application }} refers to templates which were removed.

• https://access.redhat.com/documentation/en-us/red_hat_jboss_enterprise_application_platform/8-beta/html-single/using_jboss_eap_on_openshift_container_platform/index#configuring_external_red_hat_amq_brokers

procedure use template eap74-amq-s2i which we do not deliver anymore