Some cleanup

Author: mzitnik

flink-connector-clickhouse-base/src/test/java/org/apache/flink/connector/clickhouse/sink/ClickHouseSinkTests.java

@@ -294,7 +294,7 @@ void ProductNameTest() throws Exception {
         Assertions.assertEquals(EXPECTED_ROWS, rows);
         ClickHouseServerForTests.executeSql("SYSTEM FLUSH LOGS");
         if (ClickHouseServerForTests.isCloud())
-            Thread.sleep(2000);
+            Thread.sleep(5000);
         // let's wait until data will be available in query log
         String productName = ClickHouseServerForTests.extractProductName(ClickHouseServerForTests.getDatabase(), tableName);
         String compareString = String.format("Flink-ClickHouse-Sink/%s (fv:flink/2.0.0, lv:scala/2.12)", ClickHouseSinkVersion.getVersion());

flink-connector-clickhouse-base/src/test/java/org/apache/flink/connector/test/embedded/clickhouse/ClickHouseServerForTests.java

@@ -109,9 +109,6 @@ public static String extractProductName(String databaseName, String tableName) {
         Client client = ClickHouseTestHelpers.getClient(host, port, isSSL, username, password);
         List<GenericRecord> userAgentResult = client.queryAll(extractProductName);
         if (!userAgentResult.isEmpty()) {
-            System.out.println(databaseName + " " + tableName);
-            System.out.println("http_user_agent" + userAgentResult.get(0).getString("http_user_agent"));
-            System.out.println("tables" + userAgentResult.get(0).getString("tables"));
             return userAgentResult.get(0).getString(1);
         }
         throw new RuntimeException("Query is returning empty result.");