Revert "RHEV-H ONLY: correct boot menu options due to livecd-tools update"

This commit removes nearly all boot entreis from the menu on el7.

This reverts commit 451a67d87ce2774c8daed55cb393945461448ff4.

Change-Id: I8b987b4a2b5ad655b07f056d33cf00be459edd36
Signed-off-by: Fabian Deutsch <fabiand@fedoraproject.org>