- MissingDataTest now extends IntegrationTest because otherwise it is…

… not executed in IDE (why?)

- removed public from all test classes

src/integrationTest/java/integration/tests/MissingDataTest.java

@@ -14,7 +14,7 @@
 import static org.junit.jupiter.api.Assertions.assertThrows;
 
 @TestInstance(TestInstance.Lifecycle.PER_CLASS)
-public class MissingDataTest {
+class MissingDataTest extends IntegrationTest {
     @Test
     @Tag("v2")
     void missingAccount() throws SQLException {

src/integrationTest/java/integration/tests/NullableValuesTest.java

@@ -16,7 +16,7 @@
 import static org.junit.jupiter.api.Assertions.assertNull;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
-public class NullableValuesTest extends IntegrationTest {
+class NullableValuesTest extends IntegrationTest {
     @BeforeEach
     void beforeAll() {
         executeStatementFromFile("/statements/nullable-types/ddl.sql");

src/integrationTest/java/integration/tests/NumericTypesTest.java

@@ -10,7 +10,7 @@
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
 
-public class NumericTypesTest extends IntegrationTest {
+class NumericTypesTest extends IntegrationTest {
     @Test
     void shouldHaveCorrectInfo() throws SQLException {
         try (Connection connection = this.createConnection(null);