Fix [serial] compiler warnings

Fix serialization warnings by applying @SuppressWarnings("serial")
when appropriate.

In certain cases and for unknown reasons, a correctly-placed
@SuppressWarnings("serial") annotation will fix the warning at the
javac level (i.e. the Gradle command-line), but will produce an
"unnecessary @SuppressWarnings" warning within Eclipse. In these
cases, a private static final serialVersionUID field has been added
with the default value of 1L.

spring-jdbc/src/test/java/org/springframework/beans/Colour.java

@@ -21,6 +21,7 @@ import org.springframework.core.enums.ShortCodedLabeledEnum;
 /**
  * @author Rob Harrop
  */
+@SuppressWarnings("serial")
 public class Colour extends ShortCodedLabeledEnum {
 
 	public static final Colour RED = new Colour(0, "RED");
@@ -32,4 +33,4 @@ public class Colour extends ShortCodedLabeledEnum {
 		super(code, label);
 	}
 
-}
+}

spring-jdbc/src/test/java/org/springframework/jdbc/datasource/DataSourceJtaTransactionTests.java

@@ -651,6 +651,7 @@ public class DataSourceJtaTransactionTests extends TestCase {
 		MockControl conControl = MockControl.createControl(Connection.class);
 		Connection con = (Connection) conControl.getMock();
 
+		@SuppressWarnings("serial")
 		JtaTransactionManager ptm = new JtaTransactionManager(ut) {
 			protected void doRegisterAfterCompletionWithJtaTransaction(
 					JtaTransactionObject txObject, final List synchronizations) {

spring-jdbc/src/test/java/org/springframework/jdbc/object/StoredProcedureTests.java

@@ -1047,6 +1047,7 @@ public class StoredProcedureTests extends AbstractJdbcTests {
 	}
 
 
+	@SuppressWarnings("serial")
 	private static class CustomDataException extends DataAccessException {
 
 		public CustomDataException(String s) {

spring-jdbc/src/test/java/org/springframework/jdbc/support/SQLErrorCodeSQLExceptionTranslatorTests.java

@@ -100,6 +100,7 @@ public class SQLErrorCodeSQLExceptionTranslatorTests extends TestCase {
 	}
 
 
+	@SuppressWarnings("serial")
 	public void testCustomTranslateMethodTranslation() {
 		final String TASK = "TASK";
 		final String SQL = "SQL SELECT *";