SEC-733: Changed names of <global-method-security> attributes as discussed with Ben and updated sample to reflect the changes. Also changed explicit instantiation of Jsr250 and Secured annotation MethodDefinitionSource beans in GlobalMethodSecurityBDP into bean definitions to make more tooling friendly.

samples/tutorial/src/main/webapp/WEB-INF/applicationContext-security-ns.xml

@@ -12,7 +12,7 @@
     xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
                         http://www.springframework.org/schema/security http://www.springframework.org/schema/security/spring-security-2.0.xsd">
 
-	<global-method-security secured="true"/>
+	<global-method-security secured-annotations="enabled"/>
 
     <http>
         <intercept-url pattern="/secure/extreme/**" access="ROLE_SUPERVISOR"/>