add message when public key is missing in the .ssh directory during xdsh -K

git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/trunk@4111 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd

perl-xCAT/xCAT/Utils.pm

@@ -1486,6 +1486,8 @@ sub cpSSHFiles
         || !(-e "$home/.ssh/id_rsa.pub")
         || !(-e "$home/.ssh/id_dsa.pub"))
     {
+        $rsp->{data}->[0] = "A public key was missing in the .ssh directory.";
+        xCAT::MsgUtils->message("E", $rsp, $::CALLBACK);
         return 1;
     }