Drop deprecated dependencies on Log4j, JRuby, JExcel, Burlap, Commons Pool/DBCP

This commit also removes outdated support classes for Oracle, GlassFish, JBoss.

Issue: SPR-14429

spring-aop/src/test/java/org/springframework/aop/target/CommonsPoolTargetSourceProxyTests.java

@@ -1,49 +0,0 @@
-/*
- * Copyright 2002-2013 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.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.springframework.aop.target;
-
-import org.junit.Test;
-
-import org.springframework.aop.support.AopUtils;
-import org.springframework.beans.factory.support.DefaultListableBeanFactory;
-import org.springframework.beans.factory.xml.XmlBeanDefinitionReader;
-import org.springframework.core.io.Resource;
-import org.springframework.tests.sample.beans.ITestBean;
-
-import static org.junit.Assert.*;
-import static org.springframework.tests.TestResourceUtils.*;
-
-/**
- * @author Rob Harrop
- * @author Chris Beams
- * @since 2.0
- */
-public final class CommonsPoolTargetSourceProxyTests {
-
-	private static final Resource CONTEXT =
-		qualifiedResource(CommonsPoolTargetSourceProxyTests.class, "context.xml");
-
-	@Test
-	public void testProxy() throws Exception {
-		DefaultListableBeanFactory beanFactory = new DefaultListableBeanFactory();
-		XmlBeanDefinitionReader reader = new XmlBeanDefinitionReader(beanFactory);
-		reader.loadBeanDefinitions(CONTEXT);
-		beanFactory.preInstantiateSingletons();
-		ITestBean bean = (ITestBean)beanFactory.getBean("testBean");
-		assertTrue(AopUtils.isAopProxy(bean));
-	}
-}