Goal

• As a developer, I want to have consistent compositor keyboard layout control on RHEL and Fedora, so that I has less work with the maintenance.
• As a developer, I want to use systemd-localed for keyboard layout switching, so that I can share the code on different systems (Fedora Live, spins, RHEL) where this should be supported everywhere. 

Acceptance criteria

A list of verification conditions, successful functional tests, or expected outcomes in order to declare this story/task successfully completed.

• Verify that the keyboard layout is correctly switched with the GTK UI on RHEL boot.iso.

This is backport of changes from https://fedoraproject.org/wiki/Changes/Anaconda_As_Native_Wayland_Application