BAEL-9467 Update Spring Security article

- Upgraded xml schema versions to latest

spring-security-rest/src/main/resources/webSecurityConfig.xml

@@ -5,9 +5,9 @@
 	xmlns:p="http://www.springframework.org/schema/p"
 	xsi:schemaLocation="
       http://www.springframework.org/schema/security
-      http://www.springframework.org/schema/security/spring-security-4.2.xsd
+      http://www.springframework.org/schema/security/spring-security.xsd
       http://www.springframework.org/schema/beans
-      http://www.springframework.org/schema/beans/spring-beans-4.2.xsd">
+      http://www.springframework.org/schema/beans/spring-beans.xsd">
 
 <!-- Spring Security Configurations are managed in SecurityJavaConfig class -->
 <!-- 

spring-security-rest/src/main/webapp/WEB-INF/api-servlet.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <beans xmlns="http://www.springframework.org/schema/beans"
 	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.2.xsd">
+	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
 
 	<bean id="multipartResolver"
 		class="org.springframework.web.multipart.commons.CommonsMultipartResolver">