-Have geninitrd do less, as would be expected

git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/trunk@907 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd

xCAT-server-2.0/share/xcat/netboot/rh/genimage

@@ -56,6 +56,7 @@ foreach (split /,/,$netdriver) {
 }
 
 my $installroot = "/install";
+unless ($onlyinitrd) {
 my $srcdir = "$installroot/$osver/$arch";
 @yumdirs=();
 find(\&isyumdir, <$installroot/$osver/$arch/>);
@@ -98,7 +99,6 @@ while (<$yumconfig>) {
    $yumcmd .= $_ . " ";
 }
 $yumcmd =~ s/ $/\n/;
-unless ($onlyinitrd) {
    my $rc = system($yumcmd);
    if ($rc) { 
       print "yum invocation failed\n";