Fix bug reported by Michael.Elkins@sparta.com; Create root's authkeys

file if it does not exists, and then append to it. In our elabinelab
setup, there is always an existing root authkeys file, so we missed
this error.

install/ops-install.in

@@ -564,6 +564,9 @@ Phase "ssh", "Allowing root ssh", sub {
        PhaseFail("Could not read $IDENTPUB")
 	   if ($?);
        chomp($ident);
+       if (! -e $AUTHKEYS) {
+	   CreateFileFatal($AUTHKEYS);
+       }
        AppendToFileFatal($AUTHKEYS,
 			 "from=\"${BOSSNODE}\" $ident");
    };