GUACAMOLE-696: Merge changes taking database groups into account with respect to database objects when user is otherwise external to the database.

extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-base/src/main/java/org/apache/guacamole/auth/jdbc/user/ModeledAuthenticatedUser.java

@@ -19,6 +19,7 @@
 
 package org.apache.guacamole.auth.jdbc.user;
 
+import com.google.common.collect.Sets;
 import java.util.Collections;
 import java.util.Set;
 import java.util.concurrent.ConcurrentHashMap;
@@ -169,4 +170,10 @@ public class ModeledAuthenticatedUser extends RemoteAuthenticatedUser {
         user.setIdentifier(identifier);
     }
     
+    @Override
+    public Set<String> getEffectiveUserGroups() {
+        return Sets.union(user.getEffectiveUserGroups(),
+                super.getEffectiveUserGroups());
+    }
+
 }