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/Component.java

@@ -0,0 +1,26 @@
+package com.foo;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class Component {
+	private String name;
+	private List<Component> components = new ArrayList<Component>();
+
+	// mmm, there is no setter method for the 'components'
+	public void addComponent(Component component) {
+		this.components.add(component);
+	}
+
+	public List<Component> getComponents() {
+		return components;
+	}
+
+	public String getName() {
+		return name;
+	}
+
+	public void setName(String name) {
+		this.name = name;
+	}
+}