修改bug

@@ -326,6 +326,9 @@ public class Pch5SwitchCtrl {
         List<HostInfo> ls=hostInfoService.getHostInfosByTagList(Arrays.asList(const_tags_for_nginx_node_az2.split(",")));
         if(ls!=null){
             for(HostInfo hostInfo:ls){
+                if(!newTags.endsWith(",")){
+                    newTags += ",";
+                }
                 hostInfo.setTags(newTags);
                 hostInfoService.saveHostInfo(hostInfo);
             }