Defined test method as package-private

Author: skyglass

plugin/trino-exasol/src/test/java/io/trino/plugin/exasol/TestExasolTypeMapping.java

@@ -289,15 +289,15 @@ void testTimestamp()
     }
 
     @Test
-    public void testTimestampWithTimeZone()
+    void testTimestampWithTimeZone()
     {
         //Only JVM Time Zone is currently used for testing timestamp with time zone
         //Adding test cases for other time zones would require improving the test to forcibly apply session changes for timestamp with timezone
         testTimestampWithTimeZone(ZoneId.systemDefault());
     }
 
     @Test
-    public void testUnsupportedTimestampValues()
+    void testUnsupportedTimestampValues()
     {
         try (TestTable table = new TestTable(exasolServer::execute, "tpch.test_unsupported_timestamp", "(col TIMESTAMP)")) {
             // Too early