Align EmbeddedDatabaseConnection with DatabaseDriver

Fixes gh-23036

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

 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2020 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -48,17 +48,18 @@ public enum EmbeddedDatabaseConnection {
 	/**
 	 * H2 Database Connection.
 	 */
-	H2(EmbeddedDatabaseType.H2, "org.h2.Driver", "jdbc:h2:mem:%s;DB_CLOSE_DELAY=-1;DB_CLOSE_ON_EXIT=FALSE"),
+	H2(EmbeddedDatabaseType.H2, DatabaseDriver.H2.getDriverClassName(),
+			"jdbc:h2:mem:%s;DB_CLOSE_DELAY=-1;DB_CLOSE_ON_EXIT=FALSE"),
 
 	/**
 	 * Derby Database Connection.
 	 */
-	DERBY(EmbeddedDatabaseType.DERBY, "org.apache.derby.jdbc.EmbeddedDriver", "jdbc:derby:memory:%s;create=true"),
+	DERBY(EmbeddedDatabaseType.DERBY, DatabaseDriver.DERBY.getDriverClassName(), "jdbc:derby:memory:%s;create=true"),
 
 	/**
 	 * HSQL Database Connection.
 	 */
-	HSQL(EmbeddedDatabaseType.HSQL, "org.hsqldb.jdbcDriver", "jdbc:hsqldb:mem:%s");
+	HSQL(EmbeddedDatabaseType.HSQL, DatabaseDriver.HSQLDB.getDriverClassName(), "jdbc:hsqldb:mem:%s");
 
 	private final EmbeddedDatabaseType type;