if site.vsftp is not set, default to no

git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/trunk@11561 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd

xCAT-server/lib/xcat/plugins/AAsn.pm

@@ -273,7 +273,7 @@ sub init_plugin
             print "\n"
               ; # make OK prints look better.  Only need to do this for the 1st service.
             my @tmp = xCAT::Utils->get_site_attribute("vsftp");   
-		    if ((!$tmp[0]) || ($tmp[0] !~ /0|NO|No|no|N|n/ )) {         
+		    if ($tmp[0] && ($tmp[0] !~ /0|NO|No|no|N|n/ )) {         
                 $rc = &setup_FTP();    # setup FTP
             }
             #enable the tftp-hpa for MN