rpm: Abolish scritplet templating (bsc#1189841).
    
    Outsource kernel-binary and KMP scriptlets to suse-module-tools.
    
    This allows fixing bugs in the scriptlets as well as defining initrd
    regeneration policy independent of the kernel packages.
    
    Signed-off-by: Michal Suchanek <msuchanek@suse.de>