Move namespace tests to root integration module

Prior to this change, spring-beans contained its own META-INF containing
spring.handlers and spring.schemas files in src/main/resources; it also
had files of the same name within src/test/resources/META-INF, causing
'duplicate resource' warnings and confusion in general.

This commit moves the com.foo test package, it's associated namespace
parsing tests and test versions of META-INF files to the root project
and it's src/test integration testing folder.

Issue: SPR-9431

src/test/java/com/foo/ComponentNamespaceHandler.java

@@ -0,0 +1,11 @@
+package com.foo;
+
+import org.springframework.beans.factory.xml.NamespaceHandlerSupport;
+
+public class ComponentNamespaceHandler extends NamespaceHandlerSupport {
+	@Override
+	public void init() {
+		registerBeanDefinitionParser("component",
+				new ComponentBeanDefinitionParser());
+	}
+}