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/resources/com/foo/component-config.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<beans xmlns="http://www.springframework.org/schema/beans"
+      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+      xmlns:foo="http://www.foo.com/schema/component"
+      xsi:schemaLocation="
+http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
+http://www.foo.com/schema/component http://www.foo.com/schema/component/component.xsd">
+
+   <foo:component id="bionic-family" name="Bionic-1">
+      <foo:component name="Mother-1">
+      	<foo:component name="Karate-1"/>
+  		<foo:component name="Sport-1"/>
+      </foo:component>
+      <foo:component name="Rock-1"/>
+   </foo:component>
+
+</beans>

src/test/resources/com/foo/component.xsd

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+
+<xsd:schema xmlns="http://www.foo.com/schema/component"
+         xmlns:xsd="http://www.w3.org/2001/XMLSchema"
+         targetNamespace="http://www.foo.com/schema/component"
+         elementFormDefault="qualified"
+         attributeFormDefault="unqualified">
+
+   <xsd:element name="component">
+      <xsd:complexType>
+         <xsd:choice minOccurs="0" maxOccurs="unbounded">
+            <xsd:element ref="component"/>
+         </xsd:choice>
+         <xsd:attribute name="id" type="xsd:ID"/>
+         <xsd:attribute name="name" use="required" type="xsd:string"/>
+      </xsd:complexType>
+   </xsd:element>
+
+</xsd:schema>