FIX pgsql compatibility. Add PHPUnit to avoid using dates without quotes

htdocs/accountancy/class/accountancysystem.class.php

htdocs/comm/mailing/class/advtargetemailing.class.php

htdocs/compta/bank/class/paymentvarious.class.php

htdocs/compta/localtax/class/localtax.class.php

htdocs/compta/salaries/class/paymentsalary.class.php

htdocs/compta/tva/class/tva.class.php

htdocs/core/class/events.class.php

test/phpunit/CodingPhpTest.php