HHH-12666 Only run the tests with H2

We don't need to run them with all our dialects: we just need to check
the mechanism works correctly.

At least TransactionExceptionHandlingTest fails with MariaDB so better
be safe.

hibernate-core/src/test/java/org/hibernate/test/exceptionhandling/ConstraintViolationExceptionHandlingTest.java

@@ -6,6 +6,8 @@
  */
 package org.hibernate.test.exceptionhandling;
 
+import static org.junit.Assert.fail;
+
 import javax.persistence.Column;
 import javax.persistence.Entity;
 import javax.persistence.GeneratedValue;
@@ -15,13 +17,13 @@ import javax.persistence.ManyToOne;
 
 import org.hibernate.Session;
 import org.hibernate.Transaction;
-
+import org.hibernate.dialect.H2Dialect;
+import org.hibernate.testing.RequiresDialect;
 import org.hibernate.testing.TestForIssue;
 import org.junit.Test;
 
-import static org.junit.Assert.fail;
-
 @TestForIssue(jiraKey = "HHH-12666")
+@RequiresDialect(H2Dialect.class)
 public class ConstraintViolationExceptionHandlingTest extends BaseExceptionHandlingTest {
 
 	public ConstraintViolationExceptionHandlingTest(BootstrapMethod bootstrapMethod,

hibernate-core/src/test/java/org/hibernate/test/exceptionhandling/IdentifierGenerationExceptionHandlingTest.java

@@ -6,6 +6,8 @@
  */
 package org.hibernate.test.exceptionhandling;
 
+import static org.junit.Assert.fail;
+
 import javax.persistence.CascadeType;
 import javax.persistence.Entity;
 import javax.persistence.GeneratedValue;
@@ -16,13 +18,13 @@ import javax.persistence.PrimaryKeyJoinColumn;
 import org.hibernate.Session;
 import org.hibernate.annotations.GenericGenerator;
 import org.hibernate.annotations.Parameter;
-
+import org.hibernate.dialect.H2Dialect;
+import org.hibernate.testing.RequiresDialect;
 import org.hibernate.testing.TestForIssue;
 import org.junit.Test;
 
-import static org.junit.Assert.fail;
-
 @TestForIssue(jiraKey = "HHH-12666")
+@RequiresDialect(H2Dialect.class)
 public class IdentifierGenerationExceptionHandlingTest extends BaseExceptionHandlingTest {
 
 	public IdentifierGenerationExceptionHandlingTest(

hibernate-core/src/test/java/org/hibernate/test/exceptionhandling/QuerySyntaxExceptionHandlingTest.java

@@ -13,10 +13,13 @@ import javax.persistence.Id;
 
 import org.hibernate.Session;
 import org.hibernate.Transaction;
+import org.hibernate.dialect.H2Dialect;
+import org.hibernate.testing.RequiresDialect;
 import org.hibernate.testing.TestForIssue;
 import org.junit.Test;
 
 @TestForIssue(jiraKey = "HHH-12666")
+@RequiresDialect(H2Dialect.class)
 public class QuerySyntaxExceptionHandlingTest extends BaseExceptionHandlingTest {
 
 	public QuerySyntaxExceptionHandlingTest(

hibernate-core/src/test/java/org/hibernate/test/exceptionhandling/StateObjectStateExceptionHandlingTest.java

@@ -14,10 +14,13 @@ import javax.persistence.Id;
 import javax.persistence.Version;
 
 import org.hibernate.Session;
+import org.hibernate.dialect.H2Dialect;
+import org.hibernate.testing.RequiresDialect;
 import org.hibernate.testing.TestForIssue;
 import org.junit.Test;
 
 @TestForIssue(jiraKey = "HHH-12666")
+@RequiresDialect(H2Dialect.class)
 public class StateObjectStateExceptionHandlingTest extends BaseExceptionHandlingTest {
 
 	public StateObjectStateExceptionHandlingTest(

hibernate-core/src/test/java/org/hibernate/test/exceptionhandling/TransactionExceptionHandlingTest.java

@@ -12,8 +12,9 @@ import javax.persistence.Id;
 
 import org.hibernate.Session;
 import org.hibernate.Transaction;
+import org.hibernate.dialect.H2Dialect;
 import org.hibernate.engine.spi.SessionImplementor;
-
+import org.hibernate.testing.RequiresDialect;
 import org.hibernate.testing.TestForIssue;
 import org.junit.Test;
 
@@ -21,6 +22,7 @@ import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.fail;
 
 @TestForIssue(jiraKey = "HHH-12666")
+@RequiresDialect(H2Dialect.class)
 public class TransactionExceptionHandlingTest extends BaseExceptionHandlingTest {
 
 	public TransactionExceptionHandlingTest(

hibernate-core/src/test/java/org/hibernate/test/exceptionhandling/TransientObjectExceptionHandlingTest.java

@@ -13,13 +13,15 @@ import javax.persistence.ManyToOne;
 
 import org.hibernate.Session;
 import org.hibernate.Transaction;
-
+import org.hibernate.dialect.H2Dialect;
+import org.hibernate.testing.RequiresDialect;
 import org.hibernate.testing.TestForIssue;
 import org.junit.Test;
 
 import static org.junit.Assert.fail;
 
 @TestForIssue(jiraKey = "HHH-12666")
+@RequiresDialect(H2Dialect.class)
 public class TransientObjectExceptionHandlingTest extends BaseExceptionHandlingTest {
 
 	public TransientObjectExceptionHandlingTest(BootstrapMethod bootstrapMethod,