Add @anaconda-tools to example live kickstart (#1269891)

This includes packages that anaconda runs from the installed system
during installation. It includes grub2, grub2-efi, shim, efibootmgr
among others.

Resolves: rhbz#1269891

docs/rhel7-livemedia.ks

@@ -361,6 +361,7 @@ cat /dev/null > /etc/fstab
 %end
 
 %packages
+@anaconda-tools
 @core
 @fonts
 @x11
@@ -370,9 +371,6 @@ anaconda
 isomd5sum
 kernel
 memtest86+
-grub2-efi
-grub2
-shim
 syslinux
 -dracut-config-rescue
 %end