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/ComponentFactoryBean.java

@@ -0,0 +1,38 @@
+package com.foo;
+
+import java.util.List;
+
+import org.springframework.beans.factory.FactoryBean;
+
+public class ComponentFactoryBean implements FactoryBean<Component> {
+	private Component parent;
+	private List<Component> children;
+
+	public void setParent(Component parent) {
+		this.parent = parent;
+	}
+
+	public void setChildren(List<Component> children) {
+		this.children = children;
+	}
+
+	@Override
+	public Component getObject() throws Exception {
+		if (this.children != null && this.children.size() > 0) {
+			for (Component child : children) {
+				this.parent.addComponent(child);
+			}
+		}
+		return this.parent;
+	}
+
+	@Override
+	public Class<Component> getObjectType() {
+		return Component.class;
+	}
+
+	@Override
+	public boolean isSingleton() {
+		return true;
+	}
+}