Update licensing text on files

CRM/Core/Payment/Smartdebit.php

CRM/Core/Payment/SmartdebitTrait.php

CRM/Smartdebit/Api.php

CRM/Smartdebit/Auddis.php

CRM/Smartdebit/Base.php

CRM/Smartdebit/CollectionReports.php

CRM/Smartdebit/DateUtils.php

CRM/Smartdebit/Form/Auddis.php

CRM/Smartdebit/Form/Confirm.php

CRM/Smartdebit/Form/DataSource.php

CRM/Smartdebit/Form/Payerdetails.php

CRM/Smartdebit/Form/ReconciliationFixConfirm.php

CRM/Smartdebit/Form/ReconciliationFixSelect.php

CRM/Smartdebit/Form/ReconciliationList.php

CRM/Smartdebit/Form/SettingsCustom.php

CRM/Smartdebit/Form/SyncSd.php

CRM/Smartdebit/Hook.php

CRM/Smartdebit/Mandates.php

CRM/Smartdebit/Mock.php

CRM/Smartdebit/Page/AJAX.php