There is broken link on https://access.redhat.com/documentation/en-us/red_hat_jboss_enterprise_application_platform/7.2/html/getting_started_with_jboss_eap_for_openshift_container_platform/configuring_eap_openshift_image#configuring_eap_env_vars.
See the OpenShift documentation for instructions on specifying environment variables for application containers and build containers.
It seems the cause is due to the OpenShift 4.1 document release.