Documentation no longer covers unsupported transaction recovery topics on OpenShift

XTS, JTS and XATerminator recovery is not tested or supported on OCP and Transactions propagated over JBoss Remoting are still unsupported with OpenShift 3.

It's documented in earlier versions of the guides (e.g. 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/reference_information#unsupported_transaction_recovery and https://access.redhat.com/documentation/en-us/red_hat_jboss_enterprise_application_platform/7.3/html/getting_started_with_jboss_eap_for_openshift_container_platform/reference_information#unsupported_transaction_recovery

It no longer appears in the latest version: https://access.redhat.com/documentation/en-us/red_hat_jboss_enterprise_application_platform/7.4/html/getting_started_with_jboss_eap_for_openshift_container_platform/eap-operator-for-automating-application-deployment-on-openshift_default and that needs to be corrected.