Move integration tests to dedicated module

This commit moves the dependency management and test source files
related to integration tests to a dedicated module.
This allows us to focus the root project on building the Spring
Framework.

See gh-23282

integration-tests/src/test/java/com/foo/ComponentNamespaceHandler.java

@@ -0,0 +1,27 @@
+/*
+ * 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
+ *
+ *      https://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 com.foo;
+
+import org.springframework.beans.factory.xml.NamespaceHandlerSupport;
+
+public class ComponentNamespaceHandler extends NamespaceHandlerSupport {
+	@Override
+	public void init() {
+		registerBeanDefinitionParser("component",
+				new ComponentBeanDefinitionParser());
+	}
+}