Fix phpunit to be compatible with new version of phpunit

test/phpunit/AdherentTest.php

test/phpunit/AdminLibTest.php

test/phpunit/AllTests.php

test/phpunit/BankAccountTest.php

test/phpunit/BuildDocTest.php

test/phpunit/CMailFileTest.php

test/phpunit/CategorieTest.php

test/phpunit/ChargeSocialesTest.php

test/phpunit/CommandeFournisseurTest.php

test/phpunit/CommandeTest.php

test/phpunit/CommonObjectTest.php

test/phpunit/CompanyBankAccountTest.php

test/phpunit/ContactTest.php

test/phpunit/ContratTest.php

test/phpunit/CoreTest.php

test/phpunit/DateLibTest.php

test/phpunit/DateLibTzFranceTest.php

test/phpunit/DiscountTest.php

test/phpunit/ExportTest.php

test/phpunit/FactureFournisseurTest.php