GUACAMOLE-1856: Merge correct CREATE_USER_GROUP check in creation of groups.

extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-base/src/main/java/org/apache/guacamole/auth/jdbc/usergroup/UserGroupService.java

@@ -121,7 +121,7 @@ public class UserGroupService extends ModeledDirectoryObjectService<ModeledUserG
 
         // Return whether user has explicit user group creation permission
         SystemPermissionSet permissionSet = user.getUser().getEffectivePermissions().getSystemPermissions();
-        return permissionSet.hasPermission(SystemPermission.Type.CREATE_USER);
+        return permissionSet.hasPermission(SystemPermission.Type.CREATE_USER_GROUP);
 
     }