Fix test method eventCreatePaid for php 8.2

[eileenmcnaughton]

Overview

Fix test method eventCreatePaid for php 8.2

There was another fix in here but it led to a tricky e-notice

[eileenmcnaughton]

Ah yes THAT notice

CRM_Event_Form_ParticipantTest::testPaymentAllocationOnMultiLineItemEvent
Failure in api call for Payment create: Undefined variable $CRM16923AnUnreliableMethodHasBeenUserToDeterminePaymentProcessorFromEvent
#0 /home/jenkins/bknix-dfl/build/build-x/web/sites/all/modules/civicrm/CRM/Financial/BAO/Payment.php(192): civicrm_api3('Contribution', 'completetransac...', Array)
#1 /home/jenkins/bknix-dfl/build/build-x/web/sites/all/modules/civicrm/api/v3/Payment.php(143): CRM_Financial_BAO_Payment::create(Array)
#2 /home/jenkins/bknix-dfl/build/build-x/web/sites/all/modules/civicrm/Civi/API/Provider/MagicFunctionProvider.php(89): civicrm_api3_payment_create(Array)
#3 /home/jenkins/bknix-dfl/build/build-x/web/sites/all/modules/civicrm/Civi/API/Kernel.php(158): Civi\API\Provider\MagicFunctionProvider->invoke(Array)
#4 /home/jenkins/bknix-dfl/build/build-x/web/sites/all/modules/civicrm/Civi/API/Kernel.php(81): Civi\API\Kernel->runRequest(Array)
#5 /home/jenkins/bknix-dfl/build/build-x/web/sites/all/modules/civicrm/api/api.php(22): Civi\API\Kernel->runSafe('Payment', 'create', Array)
#6 /home/jenkins/bknix-dfl/build/build-x/web/sites/all/modules/civicrm/Civi/Test/Api3TestTrait.php(292): civicrm_api('Payment', 'create', Array)
#7 /home/jenkins/bknix-dfl/build/build-x/web/sites/all/modules/civicrm/Civi/Test/Api3TestTrait.php(173): CRM_Event_Form_ParticipantTest->civicrm_api('Payment', 'create', Array)
#8 /home/jenkins/bknix-dfl/build/build-x/web/sites/all/modules/civicrm/tests/phpunit/CRM/Event/Form/ParticipantTest.php(172): CRM_Event_Form_ParticipantTest->callAPISuccess('Payment', 'create', Array)
#9 phar:///home/jenkins/bknix-dfl/extern/phpunit8/phpunit8.phar/phpunit/Framework/TestCase.php(1229): CRM_Event_Form_ParticipantTest->testPaymentAllocationOnMultiLineItemEvent()
#10 /home/jenkins/bknix-dfl/build/build-x/web/sites/all/modules/civicrm/tests/phpunit/CiviTest/CiviUnitTestCase.php(235): PHPUnit\Framework\TestCase->runTest()

[eileenmcnaughton]

test this please