[DOCS] IPS docs refer to deprecated processserver63 templates (should use 6.4)

https://access.redhat.com/documentation/en-us/red_hat_jboss_middleware_for_openshift/3/single/red_hat_jboss_bpm_suite_intelligent_process_server_for_openshift/#introduction
and
https://access.redhat.com/documentation/en-us/red_hat_jboss_brms/6.4/html-single/red_hat_jboss_brms_realtime_decision_server_for_openshift/

references BPMS 6.3 / BRMS 6.3 in text and templates tables

All of these should be updated to 6.4