Elastic search report gets broken if the elastic search server is offline during the first init of the report

[maxcherednik]

The elastic search report is getting the version of the elastic search server during the construction:

public ElasticSearchReport(ElasticReportsConfig reportConfig)
        {
            var uri = new Uri($"http://{reportConfig.Host}:{reportConfig.Port}/_bulk");
            var nodeInfoUri = new Uri($"http://{reportConfig.Host}:{reportConfig.Port}");

            _reportConfig = reportConfig;
            this.elasticSearchUri = uri;

            using (var client = new WebClient())
            {
                try
                {
                    var json = client.DownloadString(nodeInfoUri);
                    var deserializer = new DataContractJsonSerializer(typeof(ElasticSearchNodeInfo));
                    using (MemoryStream stream = new MemoryStream(Encoding.UTF8.GetBytes(json)))
                    {
                        var nodeInfo = (ElasticSearchNodeInfo)deserializer.ReadObject(stream);
                        replaceDotsOnFieldNames = nodeInfo.MajorVersionNumber >= 2;
                    }

                }
                catch (Exception ex)
                {
                    log.WarnException("Unable to get ElasticSearch version. Field names with dots won't be replaced.", ex);
                    replaceDotsOnFieldNames = false;
                }
            }
        }

So in case of any exception here all the following report attempts are broken.

Possible solutions:

1. Have the version of the elastic search configurable
2. Make the init lazy by moving to the actual reporting reporting and keep trying to init until it's initialized with every report attempt.