Refactor subsystems for authentication chaining

- An authentication chain of size 1 configured by default
- DefaultChildApplicationContextManager supports dynamic configuration of the authentication chain via Spring or JMX. Any number of instances of any type allowed in chain.
- SubsystemChainingAuthenticationComponent and SubsystemChainingAuthenticationService iterate across configured chain for Authentication
- SSO (NTLM / Kerberos) and CIFS authentication independently activatable for any component in chain (where supported).
- SubsystemChainingProxyFactory used to proxy directly to first active CIFS authenticator or SSO filter in the chain
- CIFS server knows not to bother starting if authentication chain doesn't have an active CIFS authenticator (e.g. LDAP only)
- Rationalization of subsystem configuration folder structure and JMX object naming
- Classpath based extension mechanism for community edition - alfresco/extension/subsystems/<category>/<typeName>/<id>/*.properties in classpath can be used to configure specific subsystem instances
- Simplification of JMX infrastructure. No longer Spring bean definition based, thus allowing dynamic creation/registration of new instances at runtime.
- New AuthenticationChainTest unit test

git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@14030 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/repo/security/authentication/AbstractAuthenticationService.java

@@ -28,7 +28,6 @@ import java.util.List;
 import java.util.Set;
 
 import org.alfresco.repo.cache.SimpleCache;
-import org.alfresco.service.Managed;
 import org.alfresco.service.cmr.security.AuthenticationService;
 import org.springframework.beans.factory.InitializingBean;
 
@@ -57,6 +56,7 @@ public abstract class AbstractAuthenticationService implements AuthenticationSer
         this.sysAdminCache = sysAdminCache;
     }
 
+    @SuppressWarnings("unchecked")
     public void preAuthenticationCheck(String userName) throws AuthenticationException
     {
         if (sysAdminCache != null)
@@ -77,7 +77,6 @@ public abstract class AbstractAuthenticationService implements AuthenticationSer
         }
     }
 
-    @Managed(category="Security")
     public void setAllowedUsers(List<String> allowedUsers)
     {
         if (initialised)
@@ -107,7 +106,6 @@ public abstract class AbstractAuthenticationService implements AuthenticationSer
         }
     }
 
-    @Managed(category="Security")
     public void setMaxUsers(int maxUsers)
     {
         if (initialised)