add headers

lib/Centreon/Cache/Manager/Manager.php

lib/Centreon/Db/Manager/Manager.php

lib/Centreon/Object/Acl/Action.php

lib/Centreon/Object/Acl/Group.php

lib/Centreon/Object/Acl/Menu.php

lib/Centreon/Object/Acl/Resource.php

lib/Centreon/Object/Broker/Broker.php

lib/Centreon/Object/Command/Command.php

lib/Centreon/Object/Contact/Contact.php

lib/Centreon/Object/Contact/Group.php

lib/Centreon/Object/Dependency/Dependency.php

lib/Centreon/Object/Downtime/Downtime.php

lib/Centreon/Object/Graph/Template/Template.php

lib/Centreon/Object/Host/Category.php

lib/Centreon/Object/Host/Extended.php

lib/Centreon/Object/Host/Group.php

lib/Centreon/Object/Host/Host.php

lib/Centreon/Object/Host/Macro/Custom.php

lib/Centreon/Object/Host/Template.php

lib/Centreon/Object/Instance/Instance.php