Polish "Add support for AWS Redshift JDBC driver"

Closes gh-16831

Author: snicoll

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/jdbc/DatabaseDriver.java

@@ -100,7 +100,8 @@ public String getId() {
 			"SELECT 1"),
 
 	/**
-	 * AWS Redshift.
+	 * Amazon Redshift.
+	 * @since 2.2.0
 	 */
 	REDSHIFT("Amazon Redshift", "com.amazon.redshift.jdbc.Driver", null, "SELECT 1"),
 

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/jdbc/DatabaseDriverTests.java

@@ -123,7 +123,7 @@ public void databaseJdbcUrlLookups() {
 		assertThat(DatabaseDriver.fromJdbcUrl("jdbc:postgresql://127.0.0.1:5432/sample"))
 				.isEqualTo(DatabaseDriver.POSTGRESQL);
 		assertThat(DatabaseDriver.fromJdbcUrl(
-				"jdbc:redshift://foo.bar.us-east-1.redshift.amazonaws.com:5439/postgres"))
+				"jdbc:redshift://examplecluster.abc123xyz789.us-west-2.redshift.amazonaws.com:5439/sample"))
 						.isEqualTo(DatabaseDriver.REDSHIFT);
 		assertThat(
 				DatabaseDriver.fromJdbcUrl("jdbc:jtds:sqlserver://127.0.0.1:1433/sample"))