Revert "[FEATURE] Improve performance on page tree by using cached repository"

This reverts commit 1b68c5f452e9724808adca0d1daad39c8094a5d9.
[FEATURE] Improve page-tree performance by using repository for sys_domain look-ups

This partly reintroduces changes from commit 1b68c5f452e9724808adca0d1daad39c8094a5d9

Change-Id: I8e526ee226c09b0c52b339cd44f9a47c1a78e911