elasticsearch: changed default terms min_doc_count to 1 and order by to desc, closes #8231

public/app/plugins/datasource/elasticsearch/bucket_agg.js

@@ -81,9 +81,9 @@ function (angular, _, queryDef) {
 
       switch($scope.agg.type) {
         case 'terms': {
-          settings.order = settings.order || "asc";
+          settings.order = settings.order || "desc";
           settings.size = settings.size || "10";
-          settings.min_doc_count = settings.min_doc_count || 0;
+          settings.min_doc_count = settings.min_doc_count || 1;
           settings.orderBy = settings.orderBy || "_term";
 
           if (settings.size !== '0') {