To align docs with dev BZ#1661635: 1. Explain that IdM integration no longer needs to be routed through ctlplane. 2. Update any docs that prescribe ctlplane for IdM.
Checking scope and timing.
Republished release notes: OSP13 - https://access.redhat.com/documentation/en-us/red_hat_openstack_platform/13/html-single/release_notes/index#red_hat_openstack_platform_13_maintenance_release_30_april_2019 OSP14 - https://access.redhat.com/documentation/en-us/red_hat_openstack_platform/14/html-single/release_notes/index#red_hat_openstack_platform_14_maintenance_release_30_april_2019
Update behavior has been added to release notes for OSP13+ e.g. https://access.redhat.com/documentation/en-us/red_hat_openstack_platform/13/html-single/release_notes/index#red_hat_openstack_platform_13_maintenance_release_30_april_2019