MT fixes to provide initial support for tenant-specific guests

- explicit guest access is required, such as "guest@tenant1" (note: implicit/anonymous guest access can only login to the default domain)
- also fixes issue with "Show All" users, when logged in as a tenant admin

git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@7748 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/repo/security/permissions/impl/PermissionServiceImpl.java

@@ -433,7 +433,15 @@ public class PermissionServiceImpl implements PermissionServiceSPI, Initializing
         }
         // TODO: Refactor and use the authentication service for this.
         User user = (User) auth.getPrincipal();
-        auths.add(user.getUsername());
+        
+        String username = user.getUsername();
+        auths.add(username);
+        
+        if (tenantService.getBaseNameUser(username).equalsIgnoreCase(PermissionService.GUEST_AUTHORITY))
+        {
+        	auths.add(PermissionService.GUEST_AUTHORITY);
+        }
+        
         for (GrantedAuthority authority : auth.getAuthorities())
         {
             auths.add(authority.getAuthority());
@@ -444,7 +452,7 @@ public class PermissionServiceImpl implements PermissionServiceSPI, Initializing
             {
                 for (DynamicAuthority da : dynamicAuthorities)
                 {
-                    if (da.hasAuthority(nodeRef, user.getUsername()))
+                    if (da.hasAuthority(nodeRef, username))
                     {
                         auths.add(da.getAuthority());
                     }