remove /etc/xCATSN if Management Node installed

git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/trunk@2517 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd

xCAT-server/sbin/xcatconfig

@@ -78,6 +78,9 @@ else
 {
     xCAT::MsgUtils->message('I', "Created /etc/xCATMN file.\n");
 }
+# Make sure service node file is not there 
+my $cmd = "/bin/rm /etc/xCATSN";
+my $outref = xCAT::Utils->runcmd("$cmd", 0);
 
 # some Linux-only config
 #  (used to FTP postscripts to nodes)