title: Why Service is calling multiple times when clicking on Kendo ui grid pagination
body: <p>let </p>
  
  <pre><code>dataSource = new kendo.data.DataSource({   
             type: "json",
             transport: {
                 read: {
                     type: 'POST',
                     dataType: 'json',
                      url: url,
                      contentType: 'application/json; charset=utf-8',
                      beforeSend: function (xhr: any) {
                          xhr.setRequestHeader('Token', that.userToken.sessionID)
                      }
                      // Token: that.userToken.sessionID ? that.userToken.sessionID : '',
                  },
                  parameterMap: function (data: any, type: any) {
                      console.log(type);
                      console.log(JSON.stringify(data));
                      if(type === "read"){
                          let paramObj = {
                              "request": {
                                  skip: data.skip,
                                  page: data.page,
                                  pageSize: data.pageSize,
                                  filter: searchDetails
                              },
                              "userToken": that.userToken
                          };
                          return kendo.stringify(paramObj);
                      }
                  }
             },
             schema: {
                  parse: function(response: any) {
                      return response.jsonObj.response.response;
                  },
                  total: function (response: any) {
                      return response.numFound ? response.numFound : 0
                  },
                  data: function (response: any) {
                      return that.formatResponse(response.docs);
                  }
              },          
              pageSize: 100,
              serverPaging: true,
              serverFiltering: true,
              serverSorting: true
         });
  </code></pre>